Home / 8,320.89-11,478.87-5,631.15

Finding the Fourth Proportional to 8,320.89, 11,478.87 and 5,631.15

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Solution

The fourth proportional to 8,320.89, 11,478.87 and 5,631.15 is: 7,768.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.89 : 11,478.87 = 5,631.15 : x
  2. Step 2: Convert to fraction form
    8,320.89/11,478.87 = 5,631.15/x
  3. Step 3: Cross multiply
    8,320.89x = 11,478.87 × 5,631.15
  4. Step 4: Simplify right side
    8,320.89x = 64,639,238.80
  5. Step 5: Solve for x
    x = 64,639,238.80/8,320.89
  6. Step 6: Final answer
    x = 7,768.31

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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.