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Finding the Fourth Proportional to 10,609.40, 15,913.91 and 3,587.91

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Solution

The fourth proportional to 10,609.40, 15,913.91 and 3,587.91 is: 5,381.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,609.40 : 15,913.91 = 3,587.91 : x
  2. Step 2: Convert to fraction form
    10,609.40/15,913.91 = 3,587.91/x
  3. Step 3: Cross multiply
    10,609.40x = 15,913.91 × 3,587.91
  4. Step 4: Simplify right side
    10,609.40x = 57,097,685.80
  5. Step 5: Solve for x
    x = 57,097,685.80/10,609.40
  6. Step 6: Final answer
    x = 5,381.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.