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Finding the Fourth Proportional to 10,405.55, 15,599.55 and 4,855.97

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Solution

The fourth proportional to 10,405.55, 15,599.55 and 4,855.97 is: 7,279.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,405.55 : 15,599.55 = 4,855.97 : x
  2. Step 2: Convert to fraction form
    10,405.55/15,599.55 = 4,855.97/x
  3. Step 3: Cross multiply
    10,405.55x = 15,599.55 × 4,855.97
  4. Step 4: Simplify right side
    10,405.55x = 75,750,946.81
  5. Step 5: Solve for x
    x = 75,750,946.81/10,405.55
  6. Step 6: Final answer
    x = 7,279.86

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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.