Home / 13,220.19-18,244.80-8,736.15

Finding the Fourth Proportional to 13,220.19, 18,244.80 and 8,736.15

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Solution

The fourth proportional to 13,220.19, 18,244.80 and 8,736.15 is: 12,056.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.19 : 18,244.80 = 8,736.15 : x
  2. Step 2: Convert to fraction form
    13,220.19/18,244.80 = 8,736.15/x
  3. Step 3: Cross multiply
    13,220.19x = 18,244.80 × 8,736.15
  4. Step 4: Simplify right side
    13,220.19x = 159,389,309.52
  5. Step 5: Solve for x
    x = 159,389,309.52/13,220.19
  6. Step 6: Final answer
    x = 12,056.51

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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.