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Finding the Fourth Proportional to 28,897.20, 39,877.20 and 17,719.20

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Solution

The fourth proportional to 28,897.20, 39,877.20 and 17,719.20 is: 24,451.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,897.20 : 39,877.20 = 17,719.20 : x
  2. Step 2: Convert to fraction form
    28,897.20/39,877.20 = 17,719.20/x
  3. Step 3: Cross multiply
    28,897.20x = 39,877.20 × 17,719.20
  4. Step 4: Simplify right side
    28,897.20x = 706,592,082.24
  5. Step 5: Solve for x
    x = 706,592,082.24/28,897.20
  6. Step 6: Final answer
    x = 24,451.92

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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.