Home / 20,520.89-28,320.28-11,569.23

Finding the Fourth Proportional to 20,520.89, 28,320.28 and 11,569.23

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Solution

The fourth proportional to 20,520.89, 28,320.28 and 11,569.23 is: 15,966.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.89 : 28,320.28 = 11,569.23 : x
  2. Step 2: Convert to fraction form
    20,520.89/28,320.28 = 11,569.23/x
  3. Step 3: Cross multiply
    20,520.89x = 28,320.28 × 11,569.23
  4. Step 4: Simplify right side
    20,520.89x = 327,643,869.14
  5. Step 5: Solve for x
    x = 327,643,869.14/20,520.89
  6. Step 6: Final answer
    x = 15,966.35

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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.