Home / 20,490.70-28,276.86-11,538.18

Finding the Fourth Proportional to 20,490.70, 28,276.86 and 11,538.18

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Solution

The fourth proportional to 20,490.70, 28,276.86 and 11,538.18 is: 15,922.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.70 : 28,276.86 = 11,538.18 : x
  2. Step 2: Convert to fraction form
    20,490.70/28,276.86 = 11,538.18/x
  3. Step 3: Cross multiply
    20,490.70x = 28,276.86 × 11,538.18
  4. Step 4: Simplify right side
    20,490.70x = 326,263,500.51
  5. Step 5: Solve for x
    x = 326,263,500.51/20,490.70
  6. Step 6: Final answer
    x = 15,922.52

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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.