Home / 28,228.47-38,953.17-15,479.61

Finding the Fourth Proportional to 28,228.47, 38,953.17 and 15,479.61

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Solution

The fourth proportional to 28,228.47, 38,953.17 and 15,479.61 is: 21,360.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,228.47 : 38,953.17 = 15,479.61 : x
  2. Step 2: Convert to fraction form
    28,228.47/38,953.17 = 15,479.61/x
  3. Step 3: Cross multiply
    28,228.47x = 38,953.17 × 15,479.61
  4. Step 4: Simplify right side
    28,228.47x = 602,979,879.86
  5. Step 5: Solve for x
    x = 602,979,879.86/28,228.47
  6. Step 6: Final answer
    x = 21,360.70

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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.