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Finding the Fourth Proportional to 18,300.70, 25,254.96 and 9,917.20

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Solution

The fourth proportional to 18,300.70, 25,254.96 and 9,917.20 is: 13,685.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,300.70 : 25,254.96 = 9,917.20 : x
  2. Step 2: Convert to fraction form
    18,300.70/25,254.96 = 9,917.20/x
  3. Step 3: Cross multiply
    18,300.70x = 25,254.96 × 9,917.20
  4. Step 4: Simplify right side
    18,300.70x = 250,458,363.04
  5. Step 5: Solve for x
    x = 250,458,363.04/18,300.70
  6. Step 6: Final answer
    x = 13,685.73

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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.