Home / 20,572.19-28,389.65-11,140.75

Finding the Fourth Proportional to 20,572.19, 28,389.65 and 11,140.75

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Solution

The fourth proportional to 20,572.19, 28,389.65 and 11,140.75 is: 15,374.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.19 : 28,389.65 = 11,140.75 : x
  2. Step 2: Convert to fraction form
    20,572.19/28,389.65 = 11,140.75/x
  3. Step 3: Cross multiply
    20,572.19x = 28,389.65 × 11,140.75
  4. Step 4: Simplify right side
    20,572.19x = 316,281,993.24
  5. Step 5: Solve for x
    x = 316,281,993.24/20,572.19
  6. Step 6: Final answer
    x = 15,374.25

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Half scale
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Double scale
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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.