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Finding the Fourth Proportional to 18,348.53, 25,320.90 and 10,390.88

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Solution

The fourth proportional to 18,348.53, 25,320.90 and 10,390.88 is: 14,339.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,348.53 : 25,320.90 = 10,390.88 : x
  2. Step 2: Convert to fraction form
    18,348.53/25,320.90 = 10,390.88/x
  3. Step 3: Cross multiply
    18,348.53x = 25,320.90 × 10,390.88
  4. Step 4: Simplify right side
    18,348.53x = 263,106,535.66
  5. Step 5: Solve for x
    x = 263,106,535.66/18,348.53
  6. Step 6: Final answer
    x = 14,339.38

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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.