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Finding the Fourth Proportional to 18,347.62, 25,318.90 and 10,389.68

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Solution

The fourth proportional to 18,347.62, 25,318.90 and 10,389.68 is: 14,337.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,347.62 : 25,318.90 = 10,389.68 : x
  2. Step 2: Convert to fraction form
    18,347.62/25,318.90 = 10,389.68/x
  3. Step 3: Cross multiply
    18,347.62x = 25,318.90 × 10,389.68
  4. Step 4: Simplify right side
    18,347.62x = 263,055,090.41
  5. Step 5: Solve for x
    x = 263,055,090.41/18,347.62
  6. Step 6: Final answer
    x = 14,337.29

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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.