Home / 27,878.40-38,472.48-15,131.69

Finding the Fourth Proportional to 27,878.40, 38,472.48 and 15,131.69

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Solution

The fourth proportional to 27,878.40, 38,472.48 and 15,131.69 is: 20,881.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,878.40 : 38,472.48 = 15,131.69 : x
  2. Step 2: Convert to fraction form
    27,878.40/38,472.48 = 15,131.69/x
  3. Step 3: Cross multiply
    27,878.40x = 38,472.48 × 15,131.69
  4. Step 4: Simplify right side
    27,878.40x = 582,153,565.23
  5. Step 5: Solve for x
    x = 582,153,565.23/27,878.40
  6. Step 6: Final answer
    x = 20,881.89

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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.