Home / 28,153.86-38,853.50-15,578.61

Finding the Fourth Proportional to 28,153.86, 38,853.50 and 15,578.61

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Solution

The fourth proportional to 28,153.86, 38,853.50 and 15,578.61 is: 21,499.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,153.86 : 38,853.50 = 15,578.61 : x
  2. Step 2: Convert to fraction form
    28,153.86/38,853.50 = 15,578.61/x
  3. Step 3: Cross multiply
    28,153.86x = 38,853.50 × 15,578.61
  4. Step 4: Simplify right side
    28,153.86x = 605,283,523.64
  5. Step 5: Solve for x
    x = 605,283,523.64/28,153.86
  6. Step 6: Final answer
    x = 21,499.13

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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.