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Finding the Fourth Proportional to 21,275.16, 29,236.40 and 20,299.47

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Solution

The fourth proportional to 21,275.16, 29,236.40 and 20,299.47 is: 27,895.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.16 : 29,236.40 = 20,299.47 : x
  2. Step 2: Convert to fraction form
    21,275.16/29,236.40 = 20,299.47/x
  3. Step 3: Cross multiply
    21,275.16x = 29,236.40 × 20,299.47
  4. Step 4: Simplify right side
    21,275.16x = 593,483,323.21
  5. Step 5: Solve for x
    x = 593,483,323.21/21,275.16
  6. Step 6: Final answer
    x = 27,895.60

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These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.