Home / 8,685.68-11,990.28-5,701.52

Finding the Fourth Proportional to 8,685.68, 11,990.28 and 5,701.52

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Solution

The fourth proportional to 8,685.68, 11,990.28 and 5,701.52 is: 7,870.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.68 : 11,990.28 = 5,701.52 : x
  2. Step 2: Convert to fraction form
    8,685.68/11,990.28 = 5,701.52/x
  3. Step 3: Cross multiply
    8,685.68x = 11,990.28 × 5,701.52
  4. Step 4: Simplify right side
    8,685.68x = 68,362,821.23
  5. Step 5: Solve for x
    x = 68,362,821.23/8,685.68
  6. Step 6: Final answer
    x = 7,870.75

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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.