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Finding the Fourth Proportional to 15,900.51, 21,943.73 and 9,186.42

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Solution

The fourth proportional to 15,900.51, 21,943.73 and 9,186.42 is: 12,677.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,900.51 : 21,943.73 = 9,186.42 : x
  2. Step 2: Convert to fraction form
    15,900.51/21,943.73 = 9,186.42/x
  3. Step 3: Cross multiply
    15,900.51x = 21,943.73 × 9,186.42
  4. Step 4: Simplify right side
    15,900.51x = 201,584,320.15
  5. Step 5: Solve for x
    x = 201,584,320.15/15,900.51
  6. Step 6: Final answer
    x = 12,677.85

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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.