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Finding the Fourth Proportional to 47,689.21, 65,808.65 and 28,308.93

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Solution

The fourth proportional to 47,689.21, 65,808.65 and 28,308.93 is: 39,064.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,689.21 : 65,808.65 = 28,308.93 : x
  2. Step 2: Convert to fraction form
    47,689.21/65,808.65 = 28,308.93/x
  3. Step 3: Cross multiply
    47,689.21x = 65,808.65 × 28,308.93
  4. Step 4: Simplify right side
    47,689.21x = 1,862,972,466.24
  5. Step 5: Solve for x
    x = 1,862,972,466.24/47,689.21
  6. Step 6: Final answer
    x = 39,064.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.