Home / 4,639.60-6,400.20-2,870.56

Finding the Fourth Proportional to 4,639.60, 6,400.20 and 2,870.56

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Solution

The fourth proportional to 4,639.60, 6,400.20 and 2,870.56 is: 3,959.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,639.60 : 6,400.20 = 2,870.56 : x
  2. Step 2: Convert to fraction form
    4,639.60/6,400.20 = 2,870.56/x
  3. Step 3: Cross multiply
    4,639.60x = 6,400.20 × 2,870.56
  4. Step 4: Simplify right side
    4,639.60x = 18,372,158.11
  5. Step 5: Solve for x
    x = 18,372,158.11/4,639.60
  6. Step 6: Final answer
    x = 3,959.86

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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.