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Finding the Fourth Proportional to 43,987.57, 65,931.84 and 21,816.86

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Solution

The fourth proportional to 43,987.57, 65,931.84 and 21,816.86 is: 32,700.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,987.57 : 65,931.84 = 21,816.86 : x
  2. Step 2: Convert to fraction form
    43,987.57/65,931.84 = 21,816.86/x
  3. Step 3: Cross multiply
    43,987.57x = 65,931.84 × 21,816.86
  4. Step 4: Simplify right side
    43,987.57x = 1,438,425,393.16
  5. Step 5: Solve for x
    x = 1,438,425,393.16/43,987.57
  6. Step 6: Final answer
    x = 32,700.73

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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.