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Finding the Fourth Proportional to 5,613.40, 7,746.18 and 3,129.40

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Solution

The fourth proportional to 5,613.40, 7,746.18 and 3,129.40 is: 4,318.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,613.40 : 7,746.18 = 3,129.40 : x
  2. Step 2: Convert to fraction form
    5,613.40/7,746.18 = 3,129.40/x
  3. Step 3: Cross multiply
    5,613.40x = 7,746.18 × 3,129.40
  4. Step 4: Simplify right side
    5,613.40x = 24,240,895.69
  5. Step 5: Solve for x
    x = 24,240,895.69/5,613.40
  6. Step 6: Final answer
    x = 4,318.40

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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.