Home / 13,607.64-18,781.61-8,889.21

Finding the Fourth Proportional to 13,607.64, 18,781.61 and 8,889.21

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Solution

The fourth proportional to 13,607.64, 18,781.61 and 8,889.21 is: 12,269.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.64 : 18,781.61 = 8,889.21 : x
  2. Step 2: Convert to fraction form
    13,607.64/18,781.61 = 8,889.21/x
  3. Step 3: Cross multiply
    13,607.64x = 18,781.61 × 8,889.21
  4. Step 4: Simplify right side
    13,607.64x = 166,953,630.98
  5. Step 5: Solve for x
    x = 166,953,630.98/13,607.64
  6. Step 6: Final answer
    x = 12,269.11

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1.5x scale

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.