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Finding the Fourth Proportional to 5,646.90, 7,793.02 and 3,129.30

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Solution

The fourth proportional to 5,646.90, 7,793.02 and 3,129.30 is: 4,318.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,646.90 : 7,793.02 = 3,129.30 : x
  2. Step 2: Convert to fraction form
    5,646.90/7,793.02 = 3,129.30/x
  3. Step 3: Cross multiply
    5,646.90x = 7,793.02 × 3,129.30
  4. Step 4: Simplify right side
    5,646.90x = 24,386,697.49
  5. Step 5: Solve for x
    x = 24,386,697.49/5,646.90
  6. Step 6: Final answer
    x = 4,318.60

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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.