Home / 10,621.59-15,934.32-4,378.20

Finding the Fourth Proportional to 10,621.59, 15,934.32 and 4,378.20

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Solution

The fourth proportional to 10,621.59, 15,934.32 and 4,378.20 is: 6,568.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,621.59 : 15,934.32 = 4,378.20 : x
  2. Step 2: Convert to fraction form
    10,621.59/15,934.32 = 4,378.20/x
  3. Step 3: Cross multiply
    10,621.59x = 15,934.32 × 4,378.20
  4. Step 4: Simplify right side
    10,621.59x = 69,763,639.82
  5. Step 5: Solve for x
    x = 69,763,639.82/10,621.59
  6. Step 6: Final answer
    x = 6,568.10

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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.