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Finding the Fourth Proportional to 20,993,881.70, 31,490,822.55 and 8,877,026.90

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Solution

The fourth proportional to 20,993,881.70, 31,490,822.55 and 8,877,026.90 is: 13,315,540.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993,881.70 : 31,490,822.55 = 8,877,026.90 : x
  2. Step 2: Convert to fraction form
    20,993,881.70/31,490,822.55 = 8,877,026.90/x
  3. Step 3: Cross multiply
    20,993,881.70x = 31,490,822.55 × 8,877,026.90
  4. Step 4: Simplify right side
    20,993,881.70x = 279,544,878,879,476.62
  5. Step 5: Solve for x
    x = 279,544,878,879,476.62/20,993,881.70
  6. Step 6: Final answer
    x = 13,315,540.35

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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.