Home / 27,719.19-38,257.14-15,780.87

Finding the Fourth Proportional to 27,719.19, 38,257.14 and 15,780.87

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Solution

The fourth proportional to 27,719.19, 38,257.14 and 15,780.87 is: 21,780.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,719.19 : 38,257.14 = 15,780.87 : x
  2. Step 2: Convert to fraction form
    27,719.19/38,257.14 = 15,780.87/x
  3. Step 3: Cross multiply
    27,719.19x = 38,257.14 × 15,780.87
  4. Step 4: Simplify right side
    27,719.19x = 603,730,952.91
  5. Step 5: Solve for x
    x = 603,730,952.91/27,719.19
  6. Step 6: Final answer
    x = 21,780.25

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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.