Home / 15,421.91-21,282.05-8,707.82

Finding the Fourth Proportional to 15,421.91, 21,282.05 and 8,707.82

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Solution

The fourth proportional to 15,421.91, 21,282.05 and 8,707.82 is: 12,016.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.91 : 21,282.05 = 8,707.82 : x
  2. Step 2: Convert to fraction form
    15,421.91/21,282.05 = 8,707.82/x
  3. Step 3: Cross multiply
    15,421.91x = 21,282.05 × 8,707.82
  4. Step 4: Simplify right side
    15,421.91x = 185,320,110.68
  5. Step 5: Solve for x
    x = 185,320,110.68/15,421.91
  6. Step 6: Final answer
    x = 12,016.68

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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.