Home / 15,007.72-20,711.82-8,720.56

Finding the Fourth Proportional to 15,007.72, 20,711.82 and 8,720.56

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Solution

The fourth proportional to 15,007.72, 20,711.82 and 8,720.56 is: 12,035.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,007.72 : 20,711.82 = 8,720.56 : x
  2. Step 2: Convert to fraction form
    15,007.72/20,711.82 = 8,720.56/x
  3. Step 3: Cross multiply
    15,007.72x = 20,711.82 × 8,720.56
  4. Step 4: Simplify right side
    15,007.72x = 180,618,669.02
  5. Step 5: Solve for x
    x = 180,618,669.02/15,007.72
  6. Step 6: Final answer
    x = 12,035.05

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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.