Home / 27,981.86-38,619.79-17,909.78

Finding the Fourth Proportional to 27,981.86, 38,619.79 and 17,909.78

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Solution

The fourth proportional to 27,981.86, 38,619.79 and 17,909.78 is: 24,718.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,981.86 : 38,619.79 = 17,909.78 : x
  2. Step 2: Convert to fraction form
    27,981.86/38,619.79 = 17,909.78/x
  3. Step 3: Cross multiply
    27,981.86x = 38,619.79 × 17,909.78
  4. Step 4: Simplify right side
    27,981.86x = 691,671,704.67
  5. Step 5: Solve for x
    x = 691,671,704.67/27,981.86
  6. Step 6: Final answer
    x = 24,718.58

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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.