Home / 27,981.42-38,607.71-15,879.21

Finding the Fourth Proportional to 27,981.42, 38,607.71 and 15,879.21

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Solution

The fourth proportional to 27,981.42, 38,607.71 and 15,879.21 is: 21,909.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,981.42 : 38,607.71 = 15,879.21 : x
  2. Step 2: Convert to fraction form
    27,981.42/38,607.71 = 15,879.21/x
  3. Step 3: Cross multiply
    27,981.42x = 38,607.71 × 15,879.21
  4. Step 4: Simplify right side
    27,981.42x = 613,059,710.53
  5. Step 5: Solve for x
    x = 613,059,710.53/27,981.42
  6. Step 6: Final answer
    x = 21,909.53

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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.