Home / 20,877.25-28,810.61-11,445.88

Finding the Fourth Proportional to 20,877.25, 28,810.61 and 11,445.88

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Solution

The fourth proportional to 20,877.25, 28,810.61 and 11,445.88 is: 15,795.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.25 : 28,810.61 = 11,445.88 : x
  2. Step 2: Convert to fraction form
    20,877.25/28,810.61 = 11,445.88/x
  3. Step 3: Cross multiply
    20,877.25x = 28,810.61 × 11,445.88
  4. Step 4: Simplify right side
    20,877.25x = 329,762,784.79
  5. Step 5: Solve for x
    x = 329,762,784.79/20,877.25
  6. Step 6: Final answer
    x = 15,795.32

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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.