Home / 13,990.40-19,306.56-7,616.78

Finding the Fourth Proportional to 13,990.40, 19,306.56 and 7,616.78

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Solution

The fourth proportional to 13,990.40, 19,306.56 and 7,616.78 is: 10,511.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.40 : 19,306.56 = 7,616.78 : x
  2. Step 2: Convert to fraction form
    13,990.40/19,306.56 = 7,616.78/x
  3. Step 3: Cross multiply
    13,990.40x = 19,306.56 × 7,616.78
  4. Step 4: Simplify right side
    13,990.40x = 147,053,820.08
  5. Step 5: Solve for x
    x = 147,053,820.08/13,990.40
  6. Step 6: Final answer
    x = 10,511.05

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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.