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Finding the Fourth Proportional to 27,686.88, 38,188.17 and 18,483.80

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Solution

The fourth proportional to 27,686.88, 38,188.17 and 18,483.80 is: 25,494.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,686.88 : 38,188.17 = 18,483.80 : x
  2. Step 2: Convert to fraction form
    27,686.88/38,188.17 = 18,483.80/x
  3. Step 3: Cross multiply
    27,686.88x = 38,188.17 × 18,483.80
  4. Step 4: Simplify right side
    27,686.88x = 705,862,305.71
  5. Step 5: Solve for x
    x = 705,862,305.71/27,686.88
  6. Step 6: Final answer
    x = 25,494.47

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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.