Home / 20,515.52-28,312.97-11,563.86

Finding the Fourth Proportional to 20,515.52, 28,312.97 and 11,563.86

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Solution

The fourth proportional to 20,515.52, 28,312.97 and 11,563.86 is: 15,959.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.52 : 28,312.97 = 11,563.86 : x
  2. Step 2: Convert to fraction form
    20,515.52/28,312.97 = 11,563.86/x
  3. Step 3: Cross multiply
    20,515.52x = 28,312.97 × 11,563.86
  4. Step 4: Simplify right side
    20,515.52x = 327,407,221.26
  5. Step 5: Solve for x
    x = 327,407,221.26/20,515.52
  6. Step 6: Final answer
    x = 15,959.00

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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.