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Finding the Fourth Proportional to 8,930.65, 13,395.88 and 5,421.62

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Solution

The fourth proportional to 8,930.65, 13,395.88 and 5,421.62 is: 8,132.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,930.65 : 13,395.88 = 5,421.62 : x
  2. Step 2: Convert to fraction form
    8,930.65/13,395.88 = 5,421.62/x
  3. Step 3: Cross multiply
    8,930.65x = 13,395.88 × 5,421.62
  4. Step 4: Simplify right side
    8,930.65x = 72,627,370.93
  5. Step 5: Solve for x
    x = 72,627,370.93/8,930.65
  6. Step 6: Final answer
    x = 8,132.38

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1.5x scale

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.