Home / 6,390.28-8,819.45-4,815.64

Finding the Fourth Proportional to 6,390.28, 8,819.45 and 4,815.64

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Solution

The fourth proportional to 6,390.28, 8,819.45 and 4,815.64 is: 6,646.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.28 : 8,819.45 = 4,815.64 : x
  2. Step 2: Convert to fraction form
    6,390.28/8,819.45 = 4,815.64/x
  3. Step 3: Cross multiply
    6,390.28x = 8,819.45 × 4,815.64
  4. Step 4: Simplify right side
    6,390.28x = 42,471,296.20
  5. Step 5: Solve for x
    x = 42,471,296.20/6,390.28
  6. Step 6: Final answer
    x = 6,646.23

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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.