Home / 20,915.14-28,862.93-11,355.04

Finding the Fourth Proportional to 20,915.14, 28,862.93 and 11,355.04

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Solution

The fourth proportional to 20,915.14, 28,862.93 and 11,355.04 is: 15,669.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.14 : 28,862.93 = 11,355.04 : x
  2. Step 2: Convert to fraction form
    20,915.14/28,862.93 = 11,355.04/x
  3. Step 3: Cross multiply
    20,915.14x = 28,862.93 × 11,355.04
  4. Step 4: Simplify right side
    20,915.14x = 327,739,626.78
  5. Step 5: Solve for x
    x = 327,739,626.78/20,915.14
  6. Step 6: Final answer
    x = 15,669.97

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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.