Home / 21,487.98-29,655.20-11,928.76

Finding the Fourth Proportional to 21,487.98, 29,655.20 and 11,928.76

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Solution

The fourth proportional to 21,487.98, 29,655.20 and 11,928.76 is: 16,462.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,487.98 : 29,655.20 = 11,928.76 : x
  2. Step 2: Convert to fraction form
    21,487.98/29,655.20 = 11,928.76/x
  3. Step 3: Cross multiply
    21,487.98x = 29,655.20 × 11,928.76
  4. Step 4: Simplify right side
    21,487.98x = 353,749,763.55
  5. Step 5: Solve for x
    x = 353,749,763.55/21,487.98
  6. Step 6: Final answer
    x = 16,462.68

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Double scale
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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.