Home / 20,490.15-28,276.13-11,538.54

Finding the Fourth Proportional to 20,490.15, 28,276.13 and 11,538.54

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Solution

The fourth proportional to 20,490.15, 28,276.13 and 11,538.54 is: 15,923.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.15 : 28,276.13 = 11,538.54 : x
  2. Step 2: Convert to fraction form
    20,490.15/28,276.13 = 11,538.54/x
  3. Step 3: Cross multiply
    20,490.15x = 28,276.13 × 11,538.54
  4. Step 4: Simplify right side
    20,490.15x = 326,265,199.36
  5. Step 5: Solve for x
    x = 326,265,199.36/20,490.15
  6. Step 6: Final answer
    x = 15,923.03

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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.