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Finding the Fourth Proportional to 20,949,672.90, 31,424,509.35 and 20,949,672.90

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Solution

The fourth proportional to 20,949,672.90, 31,424,509.35 and 20,949,672.90 is: 31,424,509.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949,672.90 : 31,424,509.35 = 20,949,672.90 : x
  2. Step 2: Convert to fraction form
    20,949,672.90/31,424,509.35 = 20,949,672.90/x
  3. Step 3: Cross multiply
    20,949,672.90x = 31,424,509.35 × 20,949,672.90
  4. Step 4: Simplify right side
    20,949,672.90x = 658,333,191,925,491.62
  5. Step 5: Solve for x
    x = 658,333,191,925,491.62/20,949,672.90
  6. Step 6: Final answer
    x = 31,424,509.35

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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.