Home / 20,862.69-28,792.56-11,911.55

Finding the Fourth Proportional to 20,862.69, 28,792.56 and 11,911.55

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Solution

The fourth proportional to 20,862.69, 28,792.56 and 11,911.55 is: 16,439.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.69 : 28,792.56 = 11,911.55 : x
  2. Step 2: Convert to fraction form
    20,862.69/28,792.56 = 11,911.55/x
  3. Step 3: Cross multiply
    20,862.69x = 28,792.56 × 11,911.55
  4. Step 4: Simplify right side
    20,862.69x = 342,963,874.11
  5. Step 5: Solve for x
    x = 342,963,874.11/20,862.69
  6. Step 6: Final answer
    x = 16,439.10

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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.