Home / 12,889.40-19,335.60-4,125.20

Finding the Fourth Proportional to 12,889.40, 19,335.60 and 4,125.20

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Solution

The fourth proportional to 12,889.40, 19,335.60 and 4,125.20 is: 6,188.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.40 : 19,335.60 = 4,125.20 : x
  2. Step 2: Convert to fraction form
    12,889.40/19,335.60 = 4,125.20/x
  3. Step 3: Cross multiply
    12,889.40x = 19,335.60 × 4,125.20
  4. Step 4: Simplify right side
    12,889.40x = 79,763,217.12
  5. Step 5: Solve for x
    x = 79,763,217.12/12,889.40
  6. Step 6: Final answer
    x = 6,188.28

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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.