Home / 20,570.62-28,387.43-11,139.18

Finding the Fourth Proportional to 20,570.62, 28,387.43 and 11,139.18

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Solution

The fourth proportional to 20,570.62, 28,387.43 and 11,139.18 is: 15,372.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.62 : 28,387.43 = 11,139.18 : x
  2. Step 2: Convert to fraction form
    20,570.62/28,387.43 = 11,139.18/x
  3. Step 3: Cross multiply
    20,570.62x = 28,387.43 × 11,139.18
  4. Step 4: Simplify right side
    20,570.62x = 316,212,494.87
  5. Step 5: Solve for x
    x = 316,212,494.87/20,570.62
  6. Step 6: Final answer
    x = 15,372.05

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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.