Home / 21,607.50-29,820.99-12,177.78

Finding the Fourth Proportional to 21,607.50, 29,820.99 and 12,177.78

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Solution

The fourth proportional to 21,607.50, 29,820.99 and 12,177.78 is: 16,806.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,607.50 : 29,820.99 = 12,177.78 : x
  2. Step 2: Convert to fraction form
    21,607.50/29,820.99 = 12,177.78/x
  3. Step 3: Cross multiply
    21,607.50x = 29,820.99 × 12,177.78
  4. Step 4: Simplify right side
    21,607.50x = 363,153,455.60
  5. Step 5: Solve for x
    x = 363,153,455.60/21,607.50
  6. Step 6: Final answer
    x = 16,806.82

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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.