Home / 5,685.20-8,525.64-1,987.28

Finding the Fourth Proportional to 5,685.20, 8,525.64 and 1,987.28

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Solution

The fourth proportional to 5,685.20, 8,525.64 and 1,987.28 is: 2,980.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,685.20 : 8,525.64 = 1,987.28 : x
  2. Step 2: Convert to fraction form
    5,685.20/8,525.64 = 1,987.28/x
  3. Step 3: Cross multiply
    5,685.20x = 8,525.64 × 1,987.28
  4. Step 4: Simplify right side
    5,685.20x = 16,942,833.86
  5. Step 5: Solve for x
    x = 16,942,833.86/5,685.20
  6. Step 6: Final answer
    x = 2,980.16

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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.