Home / 28,225.91-38,951.74-15,305.20

Finding the Fourth Proportional to 28,225.91, 38,951.74 and 15,305.20

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Solution

The fourth proportional to 28,225.91, 38,951.74 and 15,305.20 is: 21,121.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,225.91 : 38,951.74 = 15,305.20 : x
  2. Step 2: Convert to fraction form
    28,225.91/38,951.74 = 15,305.20/x
  3. Step 3: Cross multiply
    28,225.91x = 38,951.74 × 15,305.20
  4. Step 4: Simplify right side
    28,225.91x = 596,164,171.05
  5. Step 5: Solve for x
    x = 596,164,171.05/28,225.91
  6. Step 6: Final answer
    x = 21,121.17

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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.