Home / 8,320.72-11,497.80-7,915.76

Finding the Fourth Proportional to 8,320.72, 11,497.80 and 7,915.76

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Solution

The fourth proportional to 8,320.72, 11,497.80 and 7,915.76 is: 10,938.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.72 : 11,497.80 = 7,915.76 : x
  2. Step 2: Convert to fraction form
    8,320.72/11,497.80 = 7,915.76/x
  3. Step 3: Cross multiply
    8,320.72x = 11,497.80 × 7,915.76
  4. Step 4: Simplify right side
    8,320.72x = 91,013,825.33
  5. Step 5: Solve for x
    x = 91,013,825.33/8,320.72
  6. Step 6: Final answer
    x = 10,938.22

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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.