Home / 12,407.78-17,121.30-7,102.28

Finding the Fourth Proportional to 12,407.78, 17,121.30 and 7,102.28

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Solution

The fourth proportional to 12,407.78, 17,121.30 and 7,102.28 is: 9,800.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,407.78 : 17,121.30 = 7,102.28 : x
  2. Step 2: Convert to fraction form
    12,407.78/17,121.30 = 7,102.28/x
  3. Step 3: Cross multiply
    12,407.78x = 17,121.30 × 7,102.28
  4. Step 4: Simplify right side
    12,407.78x = 121,600,266.56
  5. Step 5: Solve for x
    x = 121,600,266.56/12,407.78
  6. Step 6: Final answer
    x = 9,800.32

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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.