Home / 20,765.89-28,657.36-11,335.06

Finding the Fourth Proportional to 20,765.89, 28,657.36 and 11,335.06

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Solution

The fourth proportional to 20,765.89, 28,657.36 and 11,335.06 is: 15,642.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.89 : 28,657.36 = 11,335.06 : x
  2. Step 2: Convert to fraction form
    20,765.89/28,657.36 = 11,335.06/x
  3. Step 3: Cross multiply
    20,765.89x = 28,657.36 × 11,335.06
  4. Step 4: Simplify right side
    20,765.89x = 324,832,895.04
  5. Step 5: Solve for x
    x = 324,832,895.04/20,765.89
  6. Step 6: Final answer
    x = 15,642.62

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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.