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Finding the Fourth Proportional to 15,710.80, 21,679.08 and 9,337.66

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Solution

The fourth proportional to 15,710.80, 21,679.08 and 9,337.66 is: 12,884.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.80 : 21,679.08 = 9,337.66 : x
  2. Step 2: Convert to fraction form
    15,710.80/21,679.08 = 9,337.66/x
  3. Step 3: Cross multiply
    15,710.80x = 21,679.08 × 9,337.66
  4. Step 4: Simplify right side
    15,710.80x = 202,431,878.15
  5. Step 5: Solve for x
    x = 202,431,878.15/15,710.80
  6. Step 6: Final answer
    x = 12,884.89

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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.