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Finding the Fourth Proportional to 18,358.35, 25,329.11 and 10,400.40

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Solution

The fourth proportional to 18,358.35, 25,329.11 and 10,400.40 is: 14,349.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,358.35 : 25,329.11 = 10,400.40 : x
  2. Step 2: Convert to fraction form
    18,358.35/25,329.11 = 10,400.40/x
  3. Step 3: Cross multiply
    18,358.35x = 25,329.11 × 10,400.40
  4. Step 4: Simplify right side
    18,358.35x = 263,432,823.64
  5. Step 5: Solve for x
    x = 263,432,823.64/18,358.35
  6. Step 6: Final answer
    x = 14,349.49

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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.