Home / 20,539.71-28,345.78-11,587.00

Finding the Fourth Proportional to 20,539.71, 28,345.78 and 11,587.00

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Solution

The fourth proportional to 20,539.71, 28,345.78 and 11,587.00 is: 15,990.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.71 : 28,345.78 = 11,587.00 : x
  2. Step 2: Convert to fraction form
    20,539.71/28,345.78 = 11,587.00/x
  3. Step 3: Cross multiply
    20,539.71x = 28,345.78 × 11,587.00
  4. Step 4: Simplify right side
    20,539.71x = 328,442,411.13
  5. Step 5: Solve for x
    x = 328,442,411.13/20,539.71
  6. Step 6: Final answer
    x = 15,990.61

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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.