Home / 12,729.49-17,562.74-7,420.55

Finding the Fourth Proportional to 12,729.49, 17,562.74 and 7,420.55

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Solution

The fourth proportional to 12,729.49, 17,562.74 and 7,420.55 is: 10,238.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,729.49 : 17,562.74 = 7,420.55 : x
  2. Step 2: Convert to fraction form
    12,729.49/17,562.74 = 7,420.55/x
  3. Step 3: Cross multiply
    12,729.49x = 17,562.74 × 7,420.55
  4. Step 4: Simplify right side
    12,729.49x = 130,325,065.39
  5. Step 5: Solve for x
    x = 130,325,065.39/12,729.49
  6. Step 6: Final answer
    x = 10,238.04

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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.