Home / 15,101.60-20,840.34-8,812.76

Finding the Fourth Proportional to 15,101.60, 20,840.34 and 8,812.76

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Solution

The fourth proportional to 15,101.60, 20,840.34 and 8,812.76 is: 12,161.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,101.60 : 20,840.34 = 8,812.76 : x
  2. Step 2: Convert to fraction form
    15,101.60/20,840.34 = 8,812.76/x
  3. Step 3: Cross multiply
    15,101.60x = 20,840.34 × 8,812.76
  4. Step 4: Simplify right side
    15,101.60x = 183,660,914.74
  5. Step 5: Solve for x
    x = 183,660,914.74/15,101.60
  6. Step 6: Final answer
    x = 12,161.69

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Half scale
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Double scale
Find fourth proportional to 15,102.60, 20,841.72 and 8,813.76
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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.