Home / 5,686.40-8,529.60-2,221.40

Finding the Fourth Proportional to 5,686.40, 8,529.60 and 2,221.40

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Solution

The fourth proportional to 5,686.40, 8,529.60 and 2,221.40 is: 3,332.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,686.40 : 8,529.60 = 2,221.40 : x
  2. Step 2: Convert to fraction form
    5,686.40/8,529.60 = 2,221.40/x
  3. Step 3: Cross multiply
    5,686.40x = 8,529.60 × 2,221.40
  4. Step 4: Simplify right side
    5,686.40x = 18,947,653.44
  5. Step 5: Solve for x
    x = 18,947,653.44/5,686.40
  6. Step 6: Final answer
    x = 3,332.10

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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.