Home / 21,430.28-29,575.94-12,355.88

Finding the Fourth Proportional to 21,430.28, 29,575.94 and 12,355.88

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Solution

The fourth proportional to 21,430.28, 29,575.94 and 12,355.88 is: 17,052.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.28 : 29,575.94 = 12,355.88 : x
  2. Step 2: Convert to fraction form
    21,430.28/29,575.94 = 12,355.88/x
  3. Step 3: Cross multiply
    21,430.28x = 29,575.94 × 12,355.88
  4. Step 4: Simplify right side
    21,430.28x = 365,436,765.53
  5. Step 5: Solve for x
    x = 365,436,765.53/21,430.28
  6. Step 6: Final answer
    x = 17,052.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.