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Finding the Fourth Proportional to 19,885.30, 29,815.90 and 9,357.53

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Solution

The fourth proportional to 19,885.30, 29,815.90 and 9,357.53 is: 14,030.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,885.30 : 29,815.90 = 9,357.53 : x
  2. Step 2: Convert to fraction form
    19,885.30/29,815.90 = 9,357.53/x
  3. Step 3: Cross multiply
    19,885.30x = 29,815.90 × 9,357.53
  4. Step 4: Simplify right side
    19,885.30x = 279,003,006.25
  5. Step 5: Solve for x
    x = 279,003,006.25/19,885.30
  6. Step 6: Final answer
    x = 14,030.62

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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.