Home / 13,380.97-18,465.52-7,715.28

Finding the Fourth Proportional to 13,380.97, 18,465.52 and 7,715.28

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Solution

The fourth proportional to 13,380.97, 18,465.52 and 7,715.28 is: 10,646.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,380.97 : 18,465.52 = 7,715.28 : x
  2. Step 2: Convert to fraction form
    13,380.97/18,465.52 = 7,715.28/x
  3. Step 3: Cross multiply
    13,380.97x = 18,465.52 × 7,715.28
  4. Step 4: Simplify right side
    13,380.97x = 142,466,565.77
  5. Step 5: Solve for x
    x = 142,466,565.77/13,380.97
  6. Step 6: Final answer
    x = 10,646.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.