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Finding the Fourth Proportional to 19,935.90, 29,903.90 and 18,718.02

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Solution

The fourth proportional to 19,935.90, 29,903.90 and 18,718.02 is: 28,077.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,935.90 : 29,903.90 = 18,718.02 : x
  2. Step 2: Convert to fraction form
    19,935.90/29,903.90 = 18,718.02/x
  3. Step 3: Cross multiply
    19,935.90x = 29,903.90 × 18,718.02
  4. Step 4: Simplify right side
    19,935.90x = 559,741,704.69
  5. Step 5: Solve for x
    x = 559,741,704.69/19,935.90
  6. Step 6: Final answer
    x = 28,077.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.