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Finding the Fourth Proportional to 18,300.68, 25,254.96 and 9,917.18

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Solution

The fourth proportional to 18,300.68, 25,254.96 and 9,917.18 is: 13,685.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,300.68 : 25,254.96 = 9,917.18 : x
  2. Step 2: Convert to fraction form
    18,300.68/25,254.96 = 9,917.18/x
  3. Step 3: Cross multiply
    18,300.68x = 25,254.96 × 9,917.18
  4. Step 4: Simplify right side
    18,300.68x = 250,457,958.26
  5. Step 5: Solve for x
    x = 250,457,958.26/18,300.68
  6. Step 6: Final answer
    x = 13,685.72

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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.