Home / 27,890-38,488.47-15,315.02

Finding the Fourth Proportional to 27,890, 38,488.47 and 15,315.02

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Solution

The fourth proportional to 27,890, 38,488.47 and 15,315.02 is: 21,134.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,890 : 38,488.47 = 15,315.02 : x
  2. Step 2: Convert to fraction form
    27,890/38,488.47 = 15,315.02/x
  3. Step 3: Cross multiply
    27,890x = 38,488.47 × 15,315.02
  4. Step 4: Simplify right side
    27,890x = 589,451,687.82
  5. Step 5: Solve for x
    x = 589,451,687.82/27,890
  6. Step 6: Final answer
    x = 21,134.88

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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.