Home / 15,856.65-21,882.44-8,686.46

Finding the Fourth Proportional to 15,856.65, 21,882.44 and 8,686.46

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Solution

The fourth proportional to 15,856.65, 21,882.44 and 8,686.46 is: 11,987.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856.65 : 21,882.44 = 8,686.46 : x
  2. Step 2: Convert to fraction form
    15,856.65/21,882.44 = 8,686.46/x
  3. Step 3: Cross multiply
    15,856.65x = 21,882.44 × 8,686.46
  4. Step 4: Simplify right side
    15,856.65x = 190,080,939.76
  5. Step 5: Solve for x
    x = 190,080,939.76/15,856.65
  6. Step 6: Final answer
    x = 11,987.46

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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.