Home / 10,439.90-14,398.68-9,178.28

Finding the Fourth Proportional to 10,439.90, 14,398.68 and 9,178.28

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Solution

The fourth proportional to 10,439.90, 14,398.68 and 9,178.28 is: 12,658.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,439.90 : 14,398.68 = 9,178.28 : x
  2. Step 2: Convert to fraction form
    10,439.90/14,398.68 = 9,178.28/x
  3. Step 3: Cross multiply
    10,439.90x = 14,398.68 × 9,178.28
  4. Step 4: Simplify right side
    10,439.90x = 132,155,116.67
  5. Step 5: Solve for x
    x = 132,155,116.67/10,439.90
  6. Step 6: Final answer
    x = 12,658.66

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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.