Home / 15,005.28-20,703.96-8,631.48

Finding the Fourth Proportional to 15,005.28, 20,703.96 and 8,631.48

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Solution

The fourth proportional to 15,005.28, 20,703.96 and 8,631.48 is: 11,909.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,005.28 : 20,703.96 = 8,631.48 : x
  2. Step 2: Convert to fraction form
    15,005.28/20,703.96 = 8,631.48/x
  3. Step 3: Cross multiply
    15,005.28x = 20,703.96 × 8,631.48
  4. Step 4: Simplify right side
    15,005.28x = 178,705,816.66
  5. Step 5: Solve for x
    x = 178,705,816.66/15,005.28
  6. Step 6: Final answer
    x = 11,909.53

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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.