Home / 13,799.66-20,685.12-12,581.76

Finding the Fourth Proportional to 13,799.66, 20,685.12 and 12,581.76

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Solution

The fourth proportional to 13,799.66, 20,685.12 and 12,581.76 is: 18,859.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,799.66 : 20,685.12 = 12,581.76 : x
  2. Step 2: Convert to fraction form
    13,799.66/20,685.12 = 12,581.76/x
  3. Step 3: Cross multiply
    13,799.66x = 20,685.12 × 12,581.76
  4. Step 4: Simplify right side
    13,799.66x = 260,255,215.41
  5. Step 5: Solve for x
    x = 260,255,215.41/13,799.66
  6. Step 6: Final answer
    x = 18,859.55

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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.