Home / 8,111.10-12,107.98-7,126.95

Finding the Fourth Proportional to 8,111.10, 12,107.98 and 7,126.95

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Solution

The fourth proportional to 8,111.10, 12,107.98 and 7,126.95 is: 10,638.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,111.10 : 12,107.98 = 7,126.95 : x
  2. Step 2: Convert to fraction form
    8,111.10/12,107.98 = 7,126.95/x
  3. Step 3: Cross multiply
    8,111.10x = 12,107.98 × 7,126.95
  4. Step 4: Simplify right side
    8,111.10x = 86,292,968.06
  5. Step 5: Solve for x
    x = 86,292,968.06/8,111.10
  6. Step 6: Final answer
    x = 10,638.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.