Home / 13,445.84-20,033.50-12,691.28

Finding the Fourth Proportional to 13,445.84, 20,033.50 and 12,691.28

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Solution

The fourth proportional to 13,445.84, 20,033.50 and 12,691.28 is: 18,909.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.84 : 20,033.50 = 12,691.28 : x
  2. Step 2: Convert to fraction form
    13,445.84/20,033.50 = 12,691.28/x
  3. Step 3: Cross multiply
    13,445.84x = 20,033.50 × 12,691.28
  4. Step 4: Simplify right side
    13,445.84x = 254,250,757.88
  5. Step 5: Solve for x
    x = 254,250,757.88/13,445.84
  6. Step 6: Final answer
    x = 18,909.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.