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Finding the Fourth Proportional to 22,365.36, 30,866.04 and 13,990.32

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Solution

The fourth proportional to 22,365.36, 30,866.04 and 13,990.32 is: 19,307.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,365.36 : 30,866.04 = 13,990.32 : x
  2. Step 2: Convert to fraction form
    22,365.36/30,866.04 = 13,990.32/x
  3. Step 3: Cross multiply
    22,365.36x = 30,866.04 × 13,990.32
  4. Step 4: Simplify right side
    22,365.36x = 431,825,776.73
  5. Step 5: Solve for x
    x = 431,825,776.73/22,365.36
  6. Step 6: Final answer
    x = 19,307.79

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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.