Home / 20,570.64-28,387.50-11,139.18

Finding the Fourth Proportional to 20,570.64, 28,387.50 and 11,139.18

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Solution

The fourth proportional to 20,570.64, 28,387.50 and 11,139.18 is: 15,372.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.64 : 28,387.50 = 11,139.18 : x
  2. Step 2: Convert to fraction form
    20,570.64/28,387.50 = 11,139.18/x
  3. Step 3: Cross multiply
    20,570.64x = 28,387.50 × 11,139.18
  4. Step 4: Simplify right side
    20,570.64x = 316,213,472.25
  5. Step 5: Solve for x
    x = 316,213,472.25/20,570.64
  6. Step 6: Final answer
    x = 15,372.08

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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.