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Finding the Fourth Proportional to 7,855.65, 10,842.80 and 4,499.55

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Solution

The fourth proportional to 7,855.65, 10,842.80 and 4,499.55 is: 6,210.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,855.65 : 10,842.80 = 4,499.55 : x
  2. Step 2: Convert to fraction form
    7,855.65/10,842.80 = 4,499.55/x
  3. Step 3: Cross multiply
    7,855.65x = 10,842.80 × 4,499.55
  4. Step 4: Simplify right side
    7,855.65x = 48,787,698.24
  5. Step 5: Solve for x
    x = 48,787,698.24/7,855.65
  6. Step 6: Final answer
    x = 6,210.52

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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.