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Finding the Fourth Proportional to 15,893.64, 21,931.77 and 9,432.16

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Solution

The fourth proportional to 15,893.64, 21,931.77 and 9,432.16 is: 13,015.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,893.64 : 21,931.77 = 9,432.16 : x
  2. Step 2: Convert to fraction form
    15,893.64/21,931.77 = 9,432.16/x
  3. Step 3: Cross multiply
    15,893.64x = 21,931.77 × 9,432.16
  4. Step 4: Simplify right side
    15,893.64x = 206,863,963.72
  5. Step 5: Solve for x
    x = 206,863,963.72/15,893.64
  6. Step 6: Final answer
    x = 13,015.52

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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.