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Finding the Fourth Proportional to 27,479.88, 37,927.90 and 15,543.72

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Solution

The fourth proportional to 27,479.88, 37,927.90 and 15,543.72 is: 21,453.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,479.88 : 37,927.90 = 15,543.72 : x
  2. Step 2: Convert to fraction form
    27,479.88/37,927.90 = 15,543.72/x
  3. Step 3: Cross multiply
    27,479.88x = 37,927.90 × 15,543.72
  4. Step 4: Simplify right side
    27,479.88x = 589,540,657.79
  5. Step 5: Solve for x
    x = 589,540,657.79/27,479.88
  6. Step 6: Final answer
    x = 21,453.54

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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.