Home / 20,478.30-28,260.96-11,526.38

Finding the Fourth Proportional to 20,478.30, 28,260.96 and 11,526.38

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Solution

The fourth proportional to 20,478.30, 28,260.96 and 11,526.38 is: 15,906.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.30 : 28,260.96 = 11,526.38 : x
  2. Step 2: Convert to fraction form
    20,478.30/28,260.96 = 11,526.38/x
  3. Step 3: Cross multiply
    20,478.30x = 28,260.96 × 11,526.38
  4. Step 4: Simplify right side
    20,478.30x = 325,746,564.12
  5. Step 5: Solve for x
    x = 325,746,564.12/20,478.30
  6. Step 6: Final answer
    x = 15,906.91

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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.