Home / 21,438.30-32,158.22-7,398.78

Finding the Fourth Proportional to 21,438.30, 32,158.22 and 7,398.78

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Solution

The fourth proportional to 21,438.30, 32,158.22 and 7,398.78 is: 11,098.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.30 : 32,158.22 = 7,398.78 : x
  2. Step 2: Convert to fraction form
    21,438.30/32,158.22 = 7,398.78/x
  3. Step 3: Cross multiply
    21,438.30x = 32,158.22 × 7,398.78
  4. Step 4: Simplify right side
    21,438.30x = 237,931,557.98
  5. Step 5: Solve for x
    x = 237,931,557.98/21,438.30
  6. Step 6: Final answer
    x = 11,098.43

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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.