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Finding the Fourth Proportional to 43,398.80, 65,098.20 and 15,690.32

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Solution

The fourth proportional to 43,398.80, 65,098.20 and 15,690.32 is: 23,535.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,398.80 : 65,098.20 = 15,690.32 : x
  2. Step 2: Convert to fraction form
    43,398.80/65,098.20 = 15,690.32/x
  3. Step 3: Cross multiply
    43,398.80x = 65,098.20 × 15,690.32
  4. Step 4: Simplify right side
    43,398.80x = 1,021,411,589.42
  5. Step 5: Solve for x
    x = 1,021,411,589.42/43,398.80
  6. Step 6: Final answer
    x = 23,535.48

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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.