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Finding the Fourth Proportional to 21,308.77, 29,406.14 and 11,877.13

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Solution

The fourth proportional to 21,308.77, 29,406.14 and 11,877.13 is: 16,390.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.77 : 29,406.14 = 11,877.13 : x
  2. Step 2: Convert to fraction form
    21,308.77/29,406.14 = 11,877.13/x
  3. Step 3: Cross multiply
    21,308.77x = 29,406.14 × 11,877.13
  4. Step 4: Simplify right side
    21,308.77x = 349,260,547.58
  5. Step 5: Solve for x
    x = 349,260,547.58/21,308.77
  6. Step 6: Final answer
    x = 16,390.46

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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.