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Finding the Fourth Proportional to 19,643,820.80, 29,415,964.80 and 15,662,508.80

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Solution

The fourth proportional to 19,643,820.80, 29,415,964.80 and 15,662,508.80 is: 23,454,083.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,643,820.80 : 29,415,964.80 = 15,662,508.80 : x
  2. Step 2: Convert to fraction form
    19,643,820.80/29,415,964.80 = 15,662,508.80/x
  3. Step 3: Cross multiply
    19,643,820.80x = 29,415,964.80 × 15,662,508.80
  4. Step 4: Simplify right side
    19,643,820.80x = 460,727,807,540,490.25
  5. Step 5: Solve for x
    x = 460,727,807,540,490.25/19,643,820.80
  6. Step 6: Final answer
    x = 23,454,083.21

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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.