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Finding the Fourth Proportional to 7,920.73, 10,931.01 and 4,564.09

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Solution

The fourth proportional to 7,920.73, 10,931.01 and 4,564.09 is: 6,298.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.73 : 10,931.01 = 4,564.09 : x
  2. Step 2: Convert to fraction form
    7,920.73/10,931.01 = 4,564.09/x
  3. Step 3: Cross multiply
    7,920.73x = 10,931.01 × 4,564.09
  4. Step 4: Simplify right side
    7,920.73x = 49,890,113.43
  5. Step 5: Solve for x
    x = 49,890,113.43/7,920.73
  6. Step 6: Final answer
    x = 6,298.68

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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.