Home / 15,932.81-21,987.79-8,859.69

Finding the Fourth Proportional to 15,932.81, 21,987.79 and 8,859.69

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Solution

The fourth proportional to 15,932.81, 21,987.79 and 8,859.69 is: 12,226.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,932.81 : 21,987.79 = 8,859.69 : x
  2. Step 2: Convert to fraction form
    15,932.81/21,987.79 = 8,859.69/x
  3. Step 3: Cross multiply
    15,932.81x = 21,987.79 × 8,859.69
  4. Step 4: Simplify right side
    15,932.81x = 194,804,981.04
  5. Step 5: Solve for x
    x = 194,804,981.04/15,932.81
  6. Step 6: Final answer
    x = 12,226.65

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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.