Home / 20,776.74-31,165.12-9,691.18

Finding the Fourth Proportional to 20,776.74, 31,165.12 and 9,691.18

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Solution

The fourth proportional to 20,776.74, 31,165.12 and 9,691.18 is: 14,536.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.74 : 31,165.12 = 9,691.18 : x
  2. Step 2: Convert to fraction form
    20,776.74/31,165.12 = 9,691.18/x
  3. Step 3: Cross multiply
    20,776.74x = 31,165.12 × 9,691.18
  4. Step 4: Simplify right side
    20,776.74x = 302,026,787.64
  5. Step 5: Solve for x
    x = 302,026,787.64/20,776.74
  6. Step 6: Final answer
    x = 14,536.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.