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Finding the Fourth Proportional to 18,358.40, 25,334.40 and 10,400.48

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Solution

The fourth proportional to 18,358.40, 25,334.40 and 10,400.48 is: 14,352.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,358.40 : 25,334.40 = 10,400.48 : x
  2. Step 2: Convert to fraction form
    18,358.40/25,334.40 = 10,400.48/x
  3. Step 3: Cross multiply
    18,358.40x = 25,334.40 × 10,400.48
  4. Step 4: Simplify right side
    18,358.40x = 263,489,920.51
  5. Step 5: Solve for x
    x = 263,489,920.51/18,358.40
  6. Step 6: Final answer
    x = 14,352.55

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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.