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Finding the Fourth Proportional to 19,613.76, 29,420.62 and 5,762.76

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Solution

The fourth proportional to 19,613.76, 29,420.62 and 5,762.76 is: 8,644.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,613.76 : 29,420.62 = 5,762.76 : x
  2. Step 2: Convert to fraction form
    19,613.76/29,420.62 = 5,762.76/x
  3. Step 3: Cross multiply
    19,613.76x = 29,420.62 × 5,762.76
  4. Step 4: Simplify right side
    19,613.76x = 169,543,972.11
  5. Step 5: Solve for x
    x = 169,543,972.11/19,613.76
  6. Step 6: Final answer
    x = 8,644.13

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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.