Home / 20,777.32-28,672.70-11,345.90

Finding the Fourth Proportional to 20,777.32, 28,672.70 and 11,345.90

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Solution

The fourth proportional to 20,777.32, 28,672.70 and 11,345.90 is: 15,657.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.32 : 28,672.70 = 11,345.90 : x
  2. Step 2: Convert to fraction form
    20,777.32/28,672.70 = 11,345.90/x
  3. Step 3: Cross multiply
    20,777.32x = 28,672.70 × 11,345.90
  4. Step 4: Simplify right side
    20,777.32x = 325,317,586.93
  5. Step 5: Solve for x
    x = 325,317,586.93/20,777.32
  6. Step 6: Final answer
    x = 15,657.34

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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.