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Finding the Fourth Proportional to 42,893.22, 64,345.47 and 15,871.87

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Solution

The fourth proportional to 42,893.22, 64,345.47 and 15,871.87 is: 23,809.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,893.22 : 64,345.47 = 15,871.87 : x
  2. Step 2: Convert to fraction form
    42,893.22/64,345.47 = 15,871.87/x
  3. Step 3: Cross multiply
    42,893.22x = 64,345.47 × 15,871.87
  4. Step 4: Simplify right side
    42,893.22x = 1,021,282,785.43
  5. Step 5: Solve for x
    x = 1,021,282,785.43/42,893.22
  6. Step 6: Final answer
    x = 23,809.89

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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.