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Finding the Fourth Proportional to 7,280.64, 10,929.60 and 7,251.84

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Solution

The fourth proportional to 7,280.64, 10,929.60 and 7,251.84 is: 10,886.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280.64 : 10,929.60 = 7,251.84 : x
  2. Step 2: Convert to fraction form
    7,280.64/10,929.60 = 7,251.84/x
  3. Step 3: Cross multiply
    7,280.64x = 10,929.60 × 7,251.84
  4. Step 4: Simplify right side
    7,280.64x = 79,259,710.46
  5. Step 5: Solve for x
    x = 79,259,710.46/7,280.64
  6. Step 6: Final answer
    x = 10,886.37

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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.