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Finding the Fourth Proportional to 21,337.20, 32,005.80 and 19,186.80

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Solution

The fourth proportional to 21,337.20, 32,005.80 and 19,186.80 is: 28,780.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,337.20 : 32,005.80 = 19,186.80 : x
  2. Step 2: Convert to fraction form
    21,337.20/32,005.80 = 19,186.80/x
  3. Step 3: Cross multiply
    21,337.20x = 32,005.80 × 19,186.80
  4. Step 4: Simplify right side
    21,337.20x = 614,088,883.44
  5. Step 5: Solve for x
    x = 614,088,883.44/21,337.20
  6. Step 6: Final answer
    x = 28,780.20

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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.