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Finding the Fourth Proportional to 15,830.67, 21,844.43 and 9,118.48

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Solution

The fourth proportional to 15,830.67, 21,844.43 and 9,118.48 is: 12,582.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,830.67 : 21,844.43 = 9,118.48 : x
  2. Step 2: Convert to fraction form
    15,830.67/21,844.43 = 9,118.48/x
  3. Step 3: Cross multiply
    15,830.67x = 21,844.43 × 9,118.48
  4. Step 4: Simplify right side
    15,830.67x = 199,187,998.07
  5. Step 5: Solve for x
    x = 199,187,998.07/15,830.67
  6. Step 6: Final answer
    x = 12,582.41

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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.