Home / 20,478.45-28,261.18-11,526.54

Finding the Fourth Proportional to 20,478.45, 28,261.18 and 11,526.54

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Solution

The fourth proportional to 20,478.45, 28,261.18 and 11,526.54 is: 15,907.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.45 : 28,261.18 = 11,526.54 : x
  2. Step 2: Convert to fraction form
    20,478.45/28,261.18 = 11,526.54/x
  3. Step 3: Cross multiply
    20,478.45x = 28,261.18 × 11,526.54
  4. Step 4: Simplify right side
    20,478.45x = 325,753,621.72
  5. Step 5: Solve for x
    x = 325,753,621.72/20,478.45
  6. Step 6: Final answer
    x = 15,907.14

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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.