Home / 20,915.07-28,862.69-11,964.12

Finding the Fourth Proportional to 20,915.07, 28,862.69 and 11,964.12

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Solution

The fourth proportional to 20,915.07, 28,862.69 and 11,964.12 is: 16,510.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.07 : 28,862.69 = 11,964.12 : x
  2. Step 2: Convert to fraction form
    20,915.07/28,862.69 = 11,964.12/x
  3. Step 3: Cross multiply
    20,915.07x = 28,862.69 × 11,964.12
  4. Step 4: Simplify right side
    20,915.07x = 345,316,626.86
  5. Step 5: Solve for x
    x = 345,316,626.86/20,915.07
  6. Step 6: Final answer
    x = 16,510.42

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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.