Home / 20,851.10-28,774.53-11,291.00

Finding the Fourth Proportional to 20,851.10, 28,774.53 and 11,291.00

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Solution

The fourth proportional to 20,851.10, 28,774.53 and 11,291.00 is: 15,581.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.10 : 28,774.53 = 11,291.00 : x
  2. Step 2: Convert to fraction form
    20,851.10/28,774.53 = 11,291.00/x
  3. Step 3: Cross multiply
    20,851.10x = 28,774.53 × 11,291.00
  4. Step 4: Simplify right side
    20,851.10x = 324,893,290.17
  5. Step 5: Solve for x
    x = 324,893,290.17/20,851.10
  6. Step 6: Final answer
    x = 15,581.59

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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.