Home / 13,639.44-18,810.12-8,915.52

Finding the Fourth Proportional to 13,639.44, 18,810.12 and 8,915.52

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Solution

The fourth proportional to 13,639.44, 18,810.12 and 8,915.52 is: 12,295.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.44 : 18,810.12 = 8,915.52 : x
  2. Step 2: Convert to fraction form
    13,639.44/18,810.12 = 8,915.52/x
  3. Step 3: Cross multiply
    13,639.44x = 18,810.12 × 8,915.52
  4. Step 4: Simplify right side
    13,639.44x = 167,702,001.06
  5. Step 5: Solve for x
    x = 167,702,001.06/13,639.44
  6. Step 6: Final answer
    x = 12,295.37

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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.