Home / 21,078,643.23-29,077,306.92-12,821,231.07

Finding the Fourth Proportional to 21,078,643.23, 29,077,306.92 and 12,821,231.07

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Solution

The fourth proportional to 21,078,643.23, 29,077,306.92 and 12,821,231.07 is: 17,686,473.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078,643.23 : 29,077,306.92 = 12,821,231.07 : x
  2. Step 2: Convert to fraction form
    21,078,643.23/29,077,306.92 = 12,821,231.07/x
  3. Step 3: Cross multiply
    21,078,643.23x = 29,077,306.92 × 12,821,231.07
  4. Step 4: Simplify right side
    21,078,643.23x = 372,806,870,914,630.06
  5. Step 5: Solve for x
    x = 372,806,870,914,630.06/21,078,643.23
  6. Step 6: Final answer
    x = 17,686,473.79

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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.