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Finding the Fourth Proportional to 18,683.74, 25,774.76 and 11,125.76

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Solution

The fourth proportional to 18,683.74, 25,774.76 and 11,125.76 is: 15,348.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683.74 : 25,774.76 = 11,125.76 : x
  2. Step 2: Convert to fraction form
    18,683.74/25,774.76 = 11,125.76/x
  3. Step 3: Cross multiply
    18,683.74x = 25,774.76 × 11,125.76
  4. Step 4: Simplify right side
    18,683.74x = 286,763,738.19
  5. Step 5: Solve for x
    x = 286,763,738.19/18,683.74
  6. Step 6: Final answer
    x = 15,348.31

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Half scale
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Double scale
Find fourth proportional to 18,684.74, 25,776.13 and 11,126.76
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.