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Finding the Fourth Proportional to 18,403.79, 25,390.75 and 12,034.10

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Solution

The fourth proportional to 18,403.79, 25,390.75 and 12,034.10 is: 16,602.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403.79 : 25,390.75 = 12,034.10 : x
  2. Step 2: Convert to fraction form
    18,403.79/25,390.75 = 12,034.10/x
  3. Step 3: Cross multiply
    18,403.79x = 25,390.75 × 12,034.10
  4. Step 4: Simplify right side
    18,403.79x = 305,554,949.46
  5. Step 5: Solve for x
    x = 305,554,949.46/18,403.79
  6. Step 6: Final answer
    x = 16,602.83

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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.