Home / 10,968.31-15,129.77-6,721.28

Finding the Fourth Proportional to 10,968.31, 15,129.77 and 6,721.28

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Solution

The fourth proportional to 10,968.31, 15,129.77 and 6,721.28 is: 9,271.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,968.31 : 15,129.77 = 6,721.28 : x
  2. Step 2: Convert to fraction form
    10,968.31/15,129.77 = 6,721.28/x
  3. Step 3: Cross multiply
    10,968.31x = 15,129.77 × 6,721.28
  4. Step 4: Simplify right side
    10,968.31x = 101,691,311.25
  5. Step 5: Solve for x
    x = 101,691,311.25/10,968.31
  6. Step 6: Final answer
    x = 9,271.38

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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.