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Finding the Fourth Proportional to 10,415.51, 15,605.04 and 8,671.72

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Solution

The fourth proportional to 10,415.51, 15,605.04 and 8,671.72 is: 12,992.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,415.51 : 15,605.04 = 8,671.72 : x
  2. Step 2: Convert to fraction form
    10,415.51/15,605.04 = 8,671.72/x
  3. Step 3: Cross multiply
    10,415.51x = 15,605.04 × 8,671.72
  4. Step 4: Simplify right side
    10,415.51x = 135,322,569.98
  5. Step 5: Solve for x
    x = 135,322,569.98/10,415.51
  6. Step 6: Final answer
    x = 12,992.41

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1.5x scale

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.