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Finding the Fourth Proportional to 8,889.95, 12,324.31 and 8,415.93

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Solution

The fourth proportional to 8,889.95, 12,324.31 and 8,415.93 is: 11,667.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,889.95 : 12,324.31 = 8,415.93 : x
  2. Step 2: Convert to fraction form
    8,889.95/12,324.31 = 8,415.93/x
  3. Step 3: Cross multiply
    8,889.95x = 12,324.31 × 8,415.93
  4. Step 4: Simplify right side
    8,889.95x = 103,720,509.22
  5. Step 5: Solve for x
    x = 103,720,509.22/8,889.95
  6. Step 6: Final answer
    x = 11,667.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.