Home / 18,420.32-25,375.56-15,220.28

Finding the Fourth Proportional to 18,420.32, 25,375.56 and 15,220.28

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Solution

The fourth proportional to 18,420.32, 25,375.56 and 15,220.28 is: 20,967.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.32 : 25,375.56 = 15,220.28 : x
  2. Step 2: Convert to fraction form
    18,420.32/25,375.56 = 15,220.28/x
  3. Step 3: Cross multiply
    18,420.32x = 25,375.56 × 15,220.28
  4. Step 4: Simplify right side
    18,420.32x = 386,223,128.36
  5. Step 5: Solve for x
    x = 386,223,128.36/18,420.32
  6. Step 6: Final answer
    x = 20,967.23

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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.