Home / 20,587.29-28,400.00-13,020.86

Finding the Fourth Proportional to 20,587.29, 28,400.00 and 13,020.86

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Solution

The fourth proportional to 20,587.29, 28,400.00 and 13,020.86 is: 17,962.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.29 : 28,400.00 = 13,020.86 : x
  2. Step 2: Convert to fraction form
    20,587.29/28,400.00 = 13,020.86/x
  3. Step 3: Cross multiply
    20,587.29x = 28,400.00 × 13,020.86
  4. Step 4: Simplify right side
    20,587.29x = 369,792,216.90
  5. Step 5: Solve for x
    x = 369,792,216.90/20,587.29
  6. Step 6: Final answer
    x = 17,962.16

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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.