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Finding the Fourth Proportional to 18,347.40, 25,319.50 and 10,391.16

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Solution

The fourth proportional to 18,347.40, 25,319.50 and 10,391.16 is: 14,339.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,347.40 : 25,319.50 = 10,391.16 : x
  2. Step 2: Convert to fraction form
    18,347.40/25,319.50 = 10,391.16/x
  3. Step 3: Cross multiply
    18,347.40x = 25,319.50 × 10,391.16
  4. Step 4: Simplify right side
    18,347.40x = 263,098,975.62
  5. Step 5: Solve for x
    x = 263,098,975.62/18,347.40
  6. Step 6: Final answer
    x = 14,339.85

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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.