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Finding the Fourth Proportional to 10,579, 15,921.60 and 7,960.08

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Solution

The fourth proportional to 10,579, 15,921.60 and 7,960.08 is: 11,980.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,579 : 15,921.60 = 7,960.08 : x
  2. Step 2: Convert to fraction form
    10,579/15,921.60 = 7,960.08/x
  3. Step 3: Cross multiply
    10,579x = 15,921.60 × 7,960.08
  4. Step 4: Simplify right side
    10,579x = 126,737,209.73
  5. Step 5: Solve for x
    x = 126,737,209.73/10,579
  6. Step 6: Final answer
    x = 11,980.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.