Home / 15,927.96-21,979.56-8,854.20

Finding the Fourth Proportional to 15,927.96, 21,979.56 and 8,854.20

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Solution

The fourth proportional to 15,927.96, 21,979.56 and 8,854.20 is: 12,218.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,927.96 : 21,979.56 = 8,854.20 : x
  2. Step 2: Convert to fraction form
    15,927.96/21,979.56 = 8,854.20/x
  3. Step 3: Cross multiply
    15,927.96x = 21,979.56 × 8,854.20
  4. Step 4: Simplify right side
    15,927.96x = 194,611,420.15
  5. Step 5: Solve for x
    x = 194,611,420.15/15,927.96
  6. Step 6: Final answer
    x = 12,218.23

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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.