Home / 12,439.62-17,166.15-7,130.76

Finding the Fourth Proportional to 12,439.62, 17,166.15 and 7,130.76

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Solution

The fourth proportional to 12,439.62, 17,166.15 and 7,130.76 is: 9,840.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.62 : 17,166.15 = 7,130.76 : x
  2. Step 2: Convert to fraction form
    12,439.62/17,166.15 = 7,130.76/x
  3. Step 3: Cross multiply
    12,439.62x = 17,166.15 × 7,130.76
  4. Step 4: Simplify right side
    12,439.62x = 122,407,695.77
  5. Step 5: Solve for x
    x = 122,407,695.77/12,439.62
  6. Step 6: Final answer
    x = 9,840.15

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Half scale
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Double scale
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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.