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Finding the Fourth Proportional to 39,891.67, 59,837.70 and 11,812.25

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Solution

The fourth proportional to 39,891.67, 59,837.70 and 11,812.25 is: 17,718.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,891.67 : 59,837.70 = 11,812.25 : x
  2. Step 2: Convert to fraction form
    39,891.67/59,837.70 = 11,812.25/x
  3. Step 3: Cross multiply
    39,891.67x = 59,837.70 × 11,812.25
  4. Step 4: Simplify right side
    39,891.67x = 706,818,111.47
  5. Step 5: Solve for x
    x = 706,818,111.47/39,891.67
  6. Step 6: Final answer
    x = 17,718.44

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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.