Home / 15,138.04-20,888.86-8,422.60

Finding the Fourth Proportional to 15,138.04, 20,888.86 and 8,422.60

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Solution

The fourth proportional to 15,138.04, 20,888.86 and 8,422.60 is: 11,622.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,138.04 : 20,888.86 = 8,422.60 : x
  2. Step 2: Convert to fraction form
    15,138.04/20,888.86 = 8,422.60/x
  3. Step 3: Cross multiply
    15,138.04x = 20,888.86 × 8,422.60
  4. Step 4: Simplify right side
    15,138.04x = 175,938,512.24
  5. Step 5: Solve for x
    x = 175,938,512.24/15,138.04
  6. Step 6: Final answer
    x = 11,622.28

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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.