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Finding the Fourth Proportional to 18,655,637.80, 27,920,252.40 and 11,471,721.88

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Solution

The fourth proportional to 18,655,637.80, 27,920,252.40 and 11,471,721.88 is: 17,168,717.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655,637.80 : 27,920,252.40 = 11,471,721.88 : x
  2. Step 2: Convert to fraction form
    18,655,637.80/27,920,252.40 = 11,471,721.88/x
  3. Step 3: Cross multiply
    18,655,637.80x = 27,920,252.40 × 11,471,721.88
  4. Step 4: Simplify right side
    18,655,637.80x = 320,293,370,352,202.50
  5. Step 5: Solve for x
    x = 320,293,370,352,202.50/18,655,637.80
  6. Step 6: Final answer
    x = 17,168,717.24

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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.