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Finding the Fourth Proportional to 12,645.67, 17,451.99 and 6,981.51

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Solution

The fourth proportional to 12,645.67, 17,451.99 and 6,981.51 is: 9,635.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.67 : 17,451.99 = 6,981.51 : x
  2. Step 2: Convert to fraction form
    12,645.67/17,451.99 = 6,981.51/x
  3. Step 3: Cross multiply
    12,645.67x = 17,451.99 × 6,981.51
  4. Step 4: Simplify right side
    12,645.67x = 121,841,209.98
  5. Step 5: Solve for x
    x = 121,841,209.98/12,645.67
  6. Step 6: Final answer
    x = 9,635.01

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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.