Home / 13,640.17-18,822.18-7,672.36

Finding the Fourth Proportional to 13,640.17, 18,822.18 and 7,672.36

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Solution

The fourth proportional to 13,640.17, 18,822.18 and 7,672.36 is: 10,587.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.17 : 18,822.18 = 7,672.36 : x
  2. Step 2: Convert to fraction form
    13,640.17/18,822.18 = 7,672.36/x
  3. Step 3: Cross multiply
    13,640.17x = 18,822.18 × 7,672.36
  4. Step 4: Simplify right side
    13,640.17x = 144,410,540.94
  5. Step 5: Solve for x
    x = 144,410,540.94/13,640.17
  6. Step 6: Final answer
    x = 10,587.15

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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.