Home / 13,931.04-20,868.96-8,385.84

Finding the Fourth Proportional to 13,931.04, 20,868.96 and 8,385.84

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Solution

The fourth proportional to 13,931.04, 20,868.96 and 8,385.84 is: 12,562.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.04 : 20,868.96 = 8,385.84 : x
  2. Step 2: Convert to fraction form
    13,931.04/20,868.96 = 8,385.84/x
  3. Step 3: Cross multiply
    13,931.04x = 20,868.96 × 8,385.84
  4. Step 4: Simplify right side
    13,931.04x = 175,003,759.53
  5. Step 5: Solve for x
    x = 175,003,759.53/13,931.04
  6. Step 6: Final answer
    x = 12,562.15

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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.