Home / 8,686.10-11,991.93-5,707.13

Finding the Fourth Proportional to 8,686.10, 11,991.93 and 5,707.13

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Solution

The fourth proportional to 8,686.10, 11,991.93 and 5,707.13 is: 7,879.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.10 : 11,991.93 = 5,707.13 : x
  2. Step 2: Convert to fraction form
    8,686.10/11,991.93 = 5,707.13/x
  3. Step 3: Cross multiply
    8,686.10x = 11,991.93 × 5,707.13
  4. Step 4: Simplify right side
    8,686.10x = 68,439,503.46
  5. Step 5: Solve for x
    x = 68,439,503.46/8,686.10
  6. Step 6: Final answer
    x = 7,879.20

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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.