Home / 28,897.12-39,877.88-15,649.12

Finding the Fourth Proportional to 28,897.12, 39,877.88 and 15,649.12

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Solution

The fourth proportional to 28,897.12, 39,877.88 and 15,649.12 is: 21,595.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,897.12 : 39,877.88 = 15,649.12 : x
  2. Step 2: Convert to fraction form
    28,897.12/39,877.88 = 15,649.12/x
  3. Step 3: Cross multiply
    28,897.12x = 39,877.88 × 15,649.12
  4. Step 4: Simplify right side
    28,897.12x = 624,053,729.47
  5. Step 5: Solve for x
    x = 624,053,729.47/28,897.12
  6. Step 6: Final answer
    x = 21,595.71

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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.