Home / 15,921.68-21,971.76-8,847.96

Finding the Fourth Proportional to 15,921.68, 21,971.76 and 8,847.96

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Solution

The fourth proportional to 15,921.68, 21,971.76 and 8,847.96 is: 12,210.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,921.68 : 21,971.76 = 8,847.96 : x
  2. Step 2: Convert to fraction form
    15,921.68/21,971.76 = 8,847.96/x
  3. Step 3: Cross multiply
    15,921.68x = 21,971.76 × 8,847.96
  4. Step 4: Simplify right side
    15,921.68x = 194,405,253.61
  5. Step 5: Solve for x
    x = 194,405,253.61/15,921.68
  6. Step 6: Final answer
    x = 12,210.10

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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.