Home / 20,687.09-28,547.33-11,255.66

Finding the Fourth Proportional to 20,687.09, 28,547.33 and 11,255.66

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Solution

The fourth proportional to 20,687.09, 28,547.33 and 11,255.66 is: 15,532.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.09 : 28,547.33 = 11,255.66 : x
  2. Step 2: Convert to fraction form
    20,687.09/28,547.33 = 11,255.66/x
  3. Step 3: Cross multiply
    20,687.09x = 28,547.33 × 11,255.66
  4. Step 4: Simplify right side
    20,687.09x = 321,318,984.11
  5. Step 5: Solve for x
    x = 321,318,984.11/20,687.09
  6. Step 6: Final answer
    x = 15,532.34

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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.