Home / 20,740.32-28,621.92-11,309.28

Finding the Fourth Proportional to 20,740.32, 28,621.92 and 11,309.28

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Solution

The fourth proportional to 20,740.32, 28,621.92 and 11,309.28 is: 15,606.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.32 : 28,621.92 = 11,309.28 : x
  2. Step 2: Convert to fraction form
    20,740.32/28,621.92 = 11,309.28/x
  3. Step 3: Cross multiply
    20,740.32x = 28,621.92 × 11,309.28
  4. Step 4: Simplify right side
    20,740.32x = 323,693,307.42
  5. Step 5: Solve for x
    x = 323,693,307.42/20,740.32
  6. Step 6: Final answer
    x = 15,606.96

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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.