Home / 15,781.14-21,776.98-8,707.62

Finding the Fourth Proportional to 15,781.14, 21,776.98 and 8,707.62

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Solution

The fourth proportional to 15,781.14, 21,776.98 and 8,707.62 is: 12,015.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.14 : 21,776.98 = 8,707.62 : x
  2. Step 2: Convert to fraction form
    15,781.14/21,776.98 = 8,707.62/x
  3. Step 3: Cross multiply
    15,781.14x = 21,776.98 × 8,707.62
  4. Step 4: Simplify right side
    15,781.14x = 189,625,666.59
  5. Step 5: Solve for x
    x = 189,625,666.59/15,781.14
  6. Step 6: Final answer
    x = 12,015.97

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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.