Home / 13,599.14-20,390.40-12,438.95

Finding the Fourth Proportional to 13,599.14, 20,390.40 and 12,438.95

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Solution

The fourth proportional to 13,599.14, 20,390.40 and 12,438.95 is: 18,650.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,599.14 : 20,390.40 = 12,438.95 : x
  2. Step 2: Convert to fraction form
    13,599.14/20,390.40 = 12,438.95/x
  3. Step 3: Cross multiply
    13,599.14x = 20,390.40 × 12,438.95
  4. Step 4: Simplify right side
    13,599.14x = 253,635,064.13
  5. Step 5: Solve for x
    x = 253,635,064.13/13,599.14
  6. Step 6: Final answer
    x = 18,650.82

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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.