Home / 8,130.40-11,220.70-5,107.72

Finding the Fourth Proportional to 8,130.40, 11,220.70 and 5,107.72

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Solution

The fourth proportional to 8,130.40, 11,220.70 and 5,107.72 is: 7,049.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,130.40 : 11,220.70 = 5,107.72 : x
  2. Step 2: Convert to fraction form
    8,130.40/11,220.70 = 5,107.72/x
  3. Step 3: Cross multiply
    8,130.40x = 11,220.70 × 5,107.72
  4. Step 4: Simplify right side
    8,130.40x = 57,312,193.80
  5. Step 5: Solve for x
    x = 57,312,193.80/8,130.40
  6. Step 6: Final answer
    x = 7,049.12

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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.