Home / 28,015.13-38,661.03-15,439.88

Finding the Fourth Proportional to 28,015.13, 38,661.03 and 15,439.88

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Solution

The fourth proportional to 28,015.13, 38,661.03 and 15,439.88 is: 21,307.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,015.13 : 38,661.03 = 15,439.88 : x
  2. Step 2: Convert to fraction form
    28,015.13/38,661.03 = 15,439.88/x
  3. Step 3: Cross multiply
    28,015.13x = 38,661.03 × 15,439.88
  4. Step 4: Simplify right side
    28,015.13x = 596,921,760.53
  5. Step 5: Solve for x
    x = 596,921,760.53/28,015.13
  6. Step 6: Final answer
    x = 21,307.12

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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.