Home / 15,876.39-21,909.42-8,802.75

Finding the Fourth Proportional to 15,876.39, 21,909.42 and 8,802.75

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Solution

The fourth proportional to 15,876.39, 21,909.42 and 8,802.75 is: 12,147.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,876.39 : 21,909.42 = 8,802.75 : x
  2. Step 2: Convert to fraction form
    15,876.39/21,909.42 = 8,802.75/x
  3. Step 3: Cross multiply
    15,876.39x = 21,909.42 × 8,802.75
  4. Step 4: Simplify right side
    15,876.39x = 192,863,146.91
  5. Step 5: Solve for x
    x = 192,863,146.91/15,876.39
  6. Step 6: Final answer
    x = 12,147.80

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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.