Home / 20,478.30-28,242.39-15,995.10

Finding the Fourth Proportional to 20,478.30, 28,242.39 and 15,995.10

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Solution

The fourth proportional to 20,478.30, 28,242.39 and 15,995.10 is: 22,059.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.30 : 28,242.39 = 15,995.10 : x
  2. Step 2: Convert to fraction form
    20,478.30/28,242.39 = 15,995.10/x
  3. Step 3: Cross multiply
    20,478.30x = 28,242.39 × 15,995.10
  4. Step 4: Simplify right side
    20,478.30x = 451,739,852.29
  5. Step 5: Solve for x
    x = 451,739,852.29/20,478.30
  6. Step 6: Final answer
    x = 22,059.44

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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.