Home / 13,639.31-18,800.78-12,495.23

Finding the Fourth Proportional to 13,639.31, 18,800.78 and 12,495.23

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Solution

The fourth proportional to 13,639.31, 18,800.78 and 12,495.23 is: 17,223.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.31 : 18,800.78 = 12,495.23 : x
  2. Step 2: Convert to fraction form
    13,639.31/18,800.78 = 12,495.23/x
  3. Step 3: Cross multiply
    13,639.31x = 18,800.78 × 12,495.23
  4. Step 4: Simplify right side
    13,639.31x = 234,919,913.80
  5. Step 5: Solve for x
    x = 234,919,913.80/13,639.31
  6. Step 6: Final answer
    x = 17,223.75

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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.