Home / 12,391.04-17,107.12-8,148.80

Finding the Fourth Proportional to 12,391.04, 17,107.12 and 8,148.80

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Solution

The fourth proportional to 12,391.04, 17,107.12 and 8,148.80 is: 11,250.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.04 : 17,107.12 = 8,148.80 : x
  2. Step 2: Convert to fraction form
    12,391.04/17,107.12 = 8,148.80/x
  3. Step 3: Cross multiply
    12,391.04x = 17,107.12 × 8,148.80
  4. Step 4: Simplify right side
    12,391.04x = 139,402,499.46
  5. Step 5: Solve for x
    x = 139,402,499.46/12,391.04
  6. Step 6: Final answer
    x = 11,250.27

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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.