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Finding the Fourth Proportional to 21,061.28, 29,053.64 and 14,255.52

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Solution

The fourth proportional to 21,061.28, 29,053.64 and 14,255.52 is: 19,665.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061.28 : 29,053.64 = 14,255.52 : x
  2. Step 2: Convert to fraction form
    21,061.28/29,053.64 = 14,255.52/x
  3. Step 3: Cross multiply
    21,061.28x = 29,053.64 × 14,255.52
  4. Step 4: Simplify right side
    21,061.28x = 414,174,746.09
  5. Step 5: Solve for x
    x = 414,174,746.09/21,061.28
  6. Step 6: Final answer
    x = 19,665.22

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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.