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Finding the Fourth Proportional to 27,159.72, 37,479.90 and 15,223.20

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Solution

The fourth proportional to 27,159.72, 37,479.90 and 15,223.20 is: 21,007.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,159.72 : 37,479.90 = 15,223.20 : x
  2. Step 2: Convert to fraction form
    27,159.72/37,479.90 = 15,223.20/x
  3. Step 3: Cross multiply
    27,159.72x = 37,479.90 × 15,223.20
  4. Step 4: Simplify right side
    27,159.72x = 570,564,013.68
  5. Step 5: Solve for x
    x = 570,564,013.68/27,159.72
  6. Step 6: Final answer
    x = 21,007.73

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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.