Home / 27,990.90-38,635.38-18,437.76

Finding the Fourth Proportional to 27,990.90, 38,635.38 and 18,437.76

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Solution

The fourth proportional to 27,990.90, 38,635.38 and 18,437.76 is: 25,449.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,990.90 : 38,635.38 = 18,437.76 : x
  2. Step 2: Convert to fraction form
    27,990.90/38,635.38 = 18,437.76/x
  3. Step 3: Cross multiply
    27,990.90x = 38,635.38 × 18,437.76
  4. Step 4: Simplify right side
    27,990.90x = 712,349,863.95
  5. Step 5: Solve for x
    x = 712,349,863.95/27,990.90
  6. Step 6: Final answer
    x = 25,449.34

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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.