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Finding the Fourth Proportional to 19,580.08, 29,399.28 and 7,916.08

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Solution

The fourth proportional to 19,580.08, 29,399.28 and 7,916.08 is: 11,885.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,580.08 : 29,399.28 = 7,916.08 : x
  2. Step 2: Convert to fraction form
    19,580.08/29,399.28 = 7,916.08/x
  3. Step 3: Cross multiply
    19,580.08x = 29,399.28 × 7,916.08
  4. Step 4: Simplify right side
    19,580.08x = 232,727,052.42
  5. Step 5: Solve for x
    x = 232,727,052.42/19,580.08
  6. Step 6: Final answer
    x = 11,885.91

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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.