Home / 20,587.16-28,410.31-11,155.72

Finding the Fourth Proportional to 20,587.16, 28,410.31 and 11,155.72

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Solution

The fourth proportional to 20,587.16, 28,410.31 and 11,155.72 is: 15,394.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.16 : 28,410.31 = 11,155.72 : x
  2. Step 2: Convert to fraction form
    20,587.16/28,410.31 = 11,155.72/x
  3. Step 3: Cross multiply
    20,587.16x = 28,410.31 × 11,155.72
  4. Step 4: Simplify right side
    20,587.16x = 316,937,463.47
  5. Step 5: Solve for x
    x = 316,937,463.47/20,587.16
  6. Step 6: Final answer
    x = 15,394.91

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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.