Home / 13,965.36-20,889.45-12,915.60

Finding the Fourth Proportional to 13,965.36, 20,889.45 and 12,915.60

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Solution

The fourth proportional to 13,965.36, 20,889.45 and 12,915.60 is: 19,319.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,965.36 : 20,889.45 = 12,915.60 : x
  2. Step 2: Convert to fraction form
    13,965.36/20,889.45 = 12,915.60/x
  3. Step 3: Cross multiply
    13,965.36x = 20,889.45 × 12,915.60
  4. Step 4: Simplify right side
    13,965.36x = 269,799,780.42
  5. Step 5: Solve for x
    x = 269,799,780.42/13,965.36
  6. Step 6: Final answer
    x = 19,319.21

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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.