Home / 28,127.18-38,815.61-15,380.16

Finding the Fourth Proportional to 28,127.18, 38,815.61 and 15,380.16

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Solution

The fourth proportional to 28,127.18, 38,815.61 and 15,380.16 is: 21,224.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,127.18 : 38,815.61 = 15,380.16 : x
  2. Step 2: Convert to fraction form
    28,127.18/38,815.61 = 15,380.16/x
  3. Step 3: Cross multiply
    28,127.18x = 38,815.61 × 15,380.16
  4. Step 4: Simplify right side
    28,127.18x = 596,990,215.40
  5. Step 5: Solve for x
    x = 596,990,215.40/28,127.18
  6. Step 6: Final answer
    x = 21,224.68

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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.