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Finding the Fourth Proportional to 18,905.13, 28,337.92 and 7,053.75

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Solution

The fourth proportional to 18,905.13, 28,337.92 and 7,053.75 is: 10,573.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.13 : 28,337.92 = 7,053.75 : x
  2. Step 2: Convert to fraction form
    18,905.13/28,337.92 = 7,053.75/x
  3. Step 3: Cross multiply
    18,905.13x = 28,337.92 × 7,053.75
  4. Step 4: Simplify right side
    18,905.13x = 199,888,585.57
  5. Step 5: Solve for x
    x = 199,888,585.57/18,905.13
  6. Step 6: Final answer
    x = 10,573.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.