Home / 12,639.36-18,961.29-4,320.30

Finding the Fourth Proportional to 12,639.36, 18,961.29 and 4,320.30

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Solution

The fourth proportional to 12,639.36, 18,961.29 and 4,320.30 is: 6,481.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.36 : 18,961.29 = 4,320.30 : x
  2. Step 2: Convert to fraction form
    12,639.36/18,961.29 = 4,320.30/x
  3. Step 3: Cross multiply
    12,639.36x = 18,961.29 × 4,320.30
  4. Step 4: Simplify right side
    12,639.36x = 81,918,461.19
  5. Step 5: Solve for x
    x = 81,918,461.19/12,639.36
  6. Step 6: Final answer
    x = 6,481.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.