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Finding the Fourth Proportional to 18,300.63, 25,254.81 and 9,917.13

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Solution

The fourth proportional to 18,300.63, 25,254.81 and 9,917.13 is: 13,685.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,300.63 : 25,254.81 = 9,917.13 : x
  2. Step 2: Convert to fraction form
    18,300.63/25,254.81 = 9,917.13/x
  3. Step 3: Cross multiply
    18,300.63x = 25,254.81 × 9,917.13
  4. Step 4: Simplify right side
    18,300.63x = 250,455,233.90
  5. Step 5: Solve for x
    x = 250,455,233.90/18,300.63
  6. Step 6: Final answer
    x = 13,685.61

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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.