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Finding the Fourth Proportional to 19,915.65, 29,866.59 and 8,830.09

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Solution

The fourth proportional to 19,915.65, 29,866.59 and 8,830.09 is: 13,242.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,915.65 : 29,866.59 = 8,830.09 : x
  2. Step 2: Convert to fraction form
    19,915.65/29,866.59 = 8,830.09/x
  3. Step 3: Cross multiply
    19,915.65x = 29,866.59 × 8,830.09
  4. Step 4: Simplify right side
    19,915.65x = 263,724,715.03
  5. Step 5: Solve for x
    x = 263,724,715.03/19,915.65
  6. Step 6: Final answer
    x = 13,242.08

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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.