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Finding the Fourth Proportional to 12,980.87, 17,919.57 and 7,602.56

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Solution

The fourth proportional to 12,980.87, 17,919.57 and 7,602.56 is: 10,495.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980.87 : 17,919.57 = 7,602.56 : x
  2. Step 2: Convert to fraction form
    12,980.87/17,919.57 = 7,602.56/x
  3. Step 3: Cross multiply
    12,980.87x = 17,919.57 × 7,602.56
  4. Step 4: Simplify right side
    12,980.87x = 136,234,545.01
  5. Step 5: Solve for x
    x = 136,234,545.01/12,980.87
  6. Step 6: Final answer
    x = 10,495.03

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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.