Home / 7,964.16-10,965.12-6,915.84

Finding the Fourth Proportional to 7,964.16, 10,965.12 and 6,915.84

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Solution

The fourth proportional to 7,964.16, 10,965.12 and 6,915.84 is: 9,521.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,964.16 : 10,965.12 = 6,915.84 : x
  2. Step 2: Convert to fraction form
    7,964.16/10,965.12 = 6,915.84/x
  3. Step 3: Cross multiply
    7,964.16x = 10,965.12 × 6,915.84
  4. Step 4: Simplify right side
    7,964.16x = 75,833,015.50
  5. Step 5: Solve for x
    x = 75,833,015.50/7,964.16
  6. Step 6: Final answer
    x = 9,521.78

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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.