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Finding the Fourth Proportional to 36,312.72, 54,480 and 11,355.42

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Solution

The fourth proportional to 36,312.72, 54,480 and 11,355.42 is: 17,036.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,312.72 : 54,480 = 11,355.42 : x
  2. Step 2: Convert to fraction form
    36,312.72/54,480 = 11,355.42/x
  3. Step 3: Cross multiply
    36,312.72x = 54,480 × 11,355.42
  4. Step 4: Simplify right side
    36,312.72x = 618,643,281.60
  5. Step 5: Solve for x
    x = 618,643,281.60/36,312.72
  6. Step 6: Final answer
    x = 17,036.54

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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.