Home / 5,685.13-8,528.55-1,989.55

Finding the Fourth Proportional to 5,685.13, 8,528.55 and 1,989.55

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Solution

The fourth proportional to 5,685.13, 8,528.55 and 1,989.55 is: 2,984.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,685.13 : 8,528.55 = 1,989.55 : x
  2. Step 2: Convert to fraction form
    5,685.13/8,528.55 = 1,989.55/x
  3. Step 3: Cross multiply
    5,685.13x = 8,528.55 × 1,989.55
  4. Step 4: Simplify right side
    5,685.13x = 16,967,976.65
  5. Step 5: Solve for x
    x = 16,967,976.65/5,685.13
  6. Step 6: Final answer
    x = 2,984.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.