Home / 20,587.61-28,410.91-11,156.17

Finding the Fourth Proportional to 20,587.61, 28,410.91 and 11,156.17

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Solution

The fourth proportional to 20,587.61, 28,410.91 and 11,156.17 is: 15,395.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.61 : 28,410.91 = 11,156.17 : x
  2. Step 2: Convert to fraction form
    20,587.61/28,410.91 = 11,156.17/x
  3. Step 3: Cross multiply
    20,587.61x = 28,410.91 × 11,156.17
  4. Step 4: Simplify right side
    20,587.61x = 316,956,934.66
  5. Step 5: Solve for x
    x = 316,956,934.66/20,587.61
  6. Step 6: Final answer
    x = 15,395.52

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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.