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Finding the Fourth Proportional to 12,387.84, 17,092.20 and 7,010.40

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Solution

The fourth proportional to 12,387.84, 17,092.20 and 7,010.40 is: 9,672.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.84 : 17,092.20 = 7,010.40 : x
  2. Step 2: Convert to fraction form
    12,387.84/17,092.20 = 7,010.40/x
  3. Step 3: Cross multiply
    12,387.84x = 17,092.20 × 7,010.40
  4. Step 4: Simplify right side
    12,387.84x = 119,823,158.88
  5. Step 5: Solve for x
    x = 119,823,158.88/12,387.84
  6. Step 6: Final answer
    x = 9,672.64

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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.