Home / 12,581.28-17,361.12-6,915.84

Finding the Fourth Proportional to 12,581.28, 17,361.12 and 6,915.84

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Solution

The fourth proportional to 12,581.28, 17,361.12 and 6,915.84 is: 9,543.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.28 : 17,361.12 = 6,915.84 : x
  2. Step 2: Convert to fraction form
    12,581.28/17,361.12 = 6,915.84/x
  3. Step 3: Cross multiply
    12,581.28x = 17,361.12 × 6,915.84
  4. Step 4: Simplify right side
    12,581.28x = 120,066,728.14
  5. Step 5: Solve for x
    x = 120,066,728.14/12,581.28
  6. Step 6: Final answer
    x = 9,543.28

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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.