Home / 20,708.40-28,577.92-11,276.96

Finding the Fourth Proportional to 20,708.40, 28,577.92 and 11,276.96

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Solution

The fourth proportional to 20,708.40, 28,577.92 and 11,276.96 is: 15,562.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.40 : 28,577.92 = 11,276.96 : x
  2. Step 2: Convert to fraction form
    20,708.40/28,577.92 = 11,276.96/x
  3. Step 3: Cross multiply
    20,708.40x = 28,577.92 × 11,276.96
  4. Step 4: Simplify right side
    20,708.40x = 322,271,889.64
  5. Step 5: Solve for x
    x = 322,271,889.64/20,708.40
  6. Step 6: Final answer
    x = 15,562.38

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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.