Home / 20,774.76-28,641.96-15,380.16

Finding the Fourth Proportional to 20,774.76, 28,641.96 and 15,380.16

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Solution

The fourth proportional to 20,774.76, 28,641.96 and 15,380.16 is: 21,204.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.76 : 28,641.96 = 15,380.16 : x
  2. Step 2: Convert to fraction form
    20,774.76/28,641.96 = 15,380.16/x
  3. Step 3: Cross multiply
    20,774.76x = 28,641.96 × 15,380.16
  4. Step 4: Simplify right side
    20,774.76x = 440,517,927.51
  5. Step 5: Solve for x
    x = 440,517,927.51/20,774.76
  6. Step 6: Final answer
    x = 21,204.48

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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.