Home / 13,101.60-19,648.80-5,311.20

Finding the Fourth Proportional to 13,101.60, 19,648.80 and 5,311.20

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Solution

The fourth proportional to 13,101.60, 19,648.80 and 5,311.20 is: 7,965.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,101.60 : 19,648.80 = 5,311.20 : x
  2. Step 2: Convert to fraction form
    13,101.60/19,648.80 = 5,311.20/x
  3. Step 3: Cross multiply
    13,101.60x = 19,648.80 × 5,311.20
  4. Step 4: Simplify right side
    13,101.60x = 104,358,706.56
  5. Step 5: Solve for x
    x = 104,358,706.56/13,101.60
  6. Step 6: Final answer
    x = 7,965.34

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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.