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Finding the Fourth Proportional to 15,484.80, 21,368.78 and 8,411.16

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Solution

The fourth proportional to 15,484.80, 21,368.78 and 8,411.16 is: 11,607.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,484.80 : 21,368.78 = 8,411.16 : x
  2. Step 2: Convert to fraction form
    15,484.80/21,368.78 = 8,411.16/x
  3. Step 3: Cross multiply
    15,484.80x = 21,368.78 × 8,411.16
  4. Step 4: Simplify right side
    15,484.80x = 179,736,227.58
  5. Step 5: Solve for x
    x = 179,736,227.58/15,484.80
  6. Step 6: Final answer
    x = 11,607.27

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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.