Home / 18,418.39-25,420.28-10,865.57

Finding the Fourth Proportional to 18,418.39, 25,420.28 and 10,865.57

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Solution

The fourth proportional to 18,418.39, 25,420.28 and 10,865.57 is: 14,996.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,418.39 : 25,420.28 = 10,865.57 : x
  2. Step 2: Convert to fraction form
    18,418.39/25,420.28 = 10,865.57/x
  3. Step 3: Cross multiply
    18,418.39x = 25,420.28 × 10,865.57
  4. Step 4: Simplify right side
    18,418.39x = 276,205,831.76
  5. Step 5: Solve for x
    x = 276,205,831.76/18,418.39
  6. Step 6: Final answer
    x = 14,996.20

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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.