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Finding the Fourth Proportional to 7,349.76, 10,140.72 and 4,205.76

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Solution

The fourth proportional to 7,349.76, 10,140.72 and 4,205.76 is: 5,802.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,349.76 : 10,140.72 = 4,205.76 : x
  2. Step 2: Convert to fraction form
    7,349.76/10,140.72 = 4,205.76/x
  3. Step 3: Cross multiply
    7,349.76x = 10,140.72 × 4,205.76
  4. Step 4: Simplify right side
    7,349.76x = 42,649,434.55
  5. Step 5: Solve for x
    x = 42,649,434.55/7,349.76
  6. Step 6: Final answer
    x = 5,802.83

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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.