Home / 13,990.28-19,306.92-7,617.20

Finding the Fourth Proportional to 13,990.28, 19,306.92 and 7,617.20

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Solution

The fourth proportional to 13,990.28, 19,306.92 and 7,617.20 is: 10,511.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.28 : 19,306.92 = 7,617.20 : x
  2. Step 2: Convert to fraction form
    13,990.28/19,306.92 = 7,617.20/x
  3. Step 3: Cross multiply
    13,990.28x = 19,306.92 × 7,617.20
  4. Step 4: Simplify right side
    13,990.28x = 147,064,671.02
  5. Step 5: Solve for x
    x = 147,064,671.02/13,990.28
  6. Step 6: Final answer
    x = 10,511.92

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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.