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Finding the Fourth Proportional to 25,792.80, 38,864.92 and 21,215.36

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Solution

The fourth proportional to 25,792.80, 38,864.92 and 21,215.36 is: 31,967.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,792.80 : 38,864.92 = 21,215.36 : x
  2. Step 2: Convert to fraction form
    25,792.80/38,864.92 = 21,215.36/x
  3. Step 3: Cross multiply
    25,792.80x = 38,864.92 × 21,215.36
  4. Step 4: Simplify right side
    25,792.80x = 824,533,269.17
  5. Step 5: Solve for x
    x = 824,533,269.17/25,792.80
  6. Step 6: Final answer
    x = 31,967.58

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These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.