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Finding the Fourth Proportional to 39,477.60, 54,482.80 and 21,575.28

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Solution

The fourth proportional to 39,477.60, 54,482.80 and 21,575.28 is: 29,775.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,477.60 : 54,482.80 = 21,575.28 : x
  2. Step 2: Convert to fraction form
    39,477.60/54,482.80 = 21,575.28/x
  3. Step 3: Cross multiply
    39,477.60x = 54,482.80 × 21,575.28
  4. Step 4: Simplify right side
    39,477.60x = 1,175,481,665.18
  5. Step 5: Solve for x
    x = 1,175,481,665.18/39,477.60
  6. Step 6: Final answer
    x = 29,775.92

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.