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Finding the Fourth Proportional to 45,487.70, 68,219.40 and 13,897.70

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Solution

The fourth proportional to 45,487.70, 68,219.40 and 13,897.70 is: 20,842.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,487.70 : 68,219.40 = 13,897.70 : x
  2. Step 2: Convert to fraction form
    45,487.70/68,219.40 = 13,897.70/x
  3. Step 3: Cross multiply
    45,487.70x = 68,219.40 × 13,897.70
  4. Step 4: Simplify right side
    45,487.70x = 948,092,755.38
  5. Step 5: Solve for x
    x = 948,092,755.38/45,487.70
  6. Step 6: Final answer
    x = 20,842.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.