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Finding the Fourth Proportional to 19,962,679.40, 29,888,031.90 and 19,402,807.40

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Solution

The fourth proportional to 19,962,679.40, 29,888,031.90 and 19,402,807.40 is: 29,049,794.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,962,679.40 : 29,888,031.90 = 19,402,807.40 : x
  2. Step 2: Convert to fraction form
    19,962,679.40/29,888,031.90 = 19,402,807.40/x
  3. Step 3: Cross multiply
    19,962,679.40x = 29,888,031.90 × 19,402,807.40
  4. Step 4: Simplify right side
    19,962,679.40x = 579,911,726,520,756
  5. Step 5: Solve for x
    x = 579,911,726,520,756/19,962,679.40
  6. Step 6: Final answer
    x = 29,049,794.11

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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.