Home / 8,621.20-12,909.84-5,690.56

Finding the Fourth Proportional to 8,621.20, 12,909.84 and 5,690.56

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Solution

The fourth proportional to 8,621.20, 12,909.84 and 5,690.56 is: 8,521.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,621.20 : 12,909.84 = 5,690.56 : x
  2. Step 2: Convert to fraction form
    8,621.20/12,909.84 = 5,690.56/x
  3. Step 3: Cross multiply
    8,621.20x = 12,909.84 × 5,690.56
  4. Step 4: Simplify right side
    8,621.20x = 73,464,219.11
  5. Step 5: Solve for x
    x = 73,464,219.11/8,621.20
  6. Step 6: Final answer
    x = 8,521.34

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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.