Home / 13,931.87-20,897.27-3,543.89

Finding the Fourth Proportional to 13,931.87, 20,897.27 and 3,543.89

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Solution

The fourth proportional to 13,931.87, 20,897.27 and 3,543.89 is: 5,315.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.87 : 20,897.27 = 3,543.89 : x
  2. Step 2: Convert to fraction form
    13,931.87/20,897.27 = 3,543.89/x
  3. Step 3: Cross multiply
    13,931.87x = 20,897.27 × 3,543.89
  4. Step 4: Simplify right side
    13,931.87x = 74,057,608.46
  5. Step 5: Solve for x
    x = 74,057,608.46/13,931.87
  6. Step 6: Final answer
    x = 5,315.70

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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.