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Finding the Fourth Proportional to 15,207.40, 20,964.18 and 9,893.80

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Solution

The fourth proportional to 15,207.40, 20,964.18 and 9,893.80 is: 13,639.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,207.40 : 20,964.18 = 9,893.80 : x
  2. Step 2: Convert to fraction form
    15,207.40/20,964.18 = 9,893.80/x
  3. Step 3: Cross multiply
    15,207.40x = 20,964.18 × 9,893.80
  4. Step 4: Simplify right side
    15,207.40x = 207,415,404.08
  5. Step 5: Solve for x
    x = 207,415,404.08/15,207.40
  6. Step 6: Final answer
    x = 13,639.11

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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.