Home / 13,389.39-18,476.76-8,921.22

Finding the Fourth Proportional to 13,389.39, 18,476.76 and 8,921.22

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Solution

The fourth proportional to 13,389.39, 18,476.76 and 8,921.22 is: 12,310.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.39 : 18,476.76 = 8,921.22 : x
  2. Step 2: Convert to fraction form
    13,389.39/18,476.76 = 8,921.22/x
  3. Step 3: Cross multiply
    13,389.39x = 18,476.76 × 8,921.22
  4. Step 4: Simplify right side
    13,389.39x = 164,835,240.85
  5. Step 5: Solve for x
    x = 164,835,240.85/13,389.39
  6. Step 6: Final answer
    x = 12,310.89

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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.