Home / 13,339.36-18,405.12-8,622.76

Finding the Fourth Proportional to 13,339.36, 18,405.12 and 8,622.76

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Solution

The fourth proportional to 13,339.36, 18,405.12 and 8,622.76 is: 11,897.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.36 : 18,405.12 = 8,622.76 : x
  2. Step 2: Convert to fraction form
    13,339.36/18,405.12 = 8,622.76/x
  3. Step 3: Cross multiply
    13,339.36x = 18,405.12 × 8,622.76
  4. Step 4: Simplify right side
    13,339.36x = 158,702,932.53
  5. Step 5: Solve for x
    x = 158,702,932.53/13,339.36
  6. Step 6: Final answer
    x = 11,897.34

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Double scale
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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.