Home / 20,513.59-28,301.12-13,788.57

Finding the Fourth Proportional to 20,513.59, 28,301.12 and 13,788.57

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Solution

The fourth proportional to 20,513.59, 28,301.12 and 13,788.57 is: 19,023.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.59 : 28,301.12 = 13,788.57 : x
  2. Step 2: Convert to fraction form
    20,513.59/28,301.12 = 13,788.57/x
  3. Step 3: Cross multiply
    20,513.59x = 28,301.12 × 13,788.57
  4. Step 4: Simplify right side
    20,513.59x = 390,231,937.92
  5. Step 5: Solve for x
    x = 390,231,937.92/20,513.59
  6. Step 6: Final answer
    x = 19,023.09

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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.