Home / 20,392.61-28,151.69-13,675.78

Finding the Fourth Proportional to 20,392.61, 28,151.69 and 13,675.78

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Solution

The fourth proportional to 20,392.61, 28,151.69 and 13,675.78 is: 18,879.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.61 : 28,151.69 = 13,675.78 : x
  2. Step 2: Convert to fraction form
    20,392.61/28,151.69 = 13,675.78/x
  3. Step 3: Cross multiply
    20,392.61x = 28,151.69 × 13,675.78
  4. Step 4: Simplify right side
    20,392.61x = 384,996,319.07
  5. Step 5: Solve for x
    x = 384,996,319.07/20,392.61
  6. Step 6: Final answer
    x = 18,879.21

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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.