Home / 13,281.70-19,922.54-3,420.72

Finding the Fourth Proportional to 13,281.70, 19,922.54 and 3,420.72

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Solution

The fourth proportional to 13,281.70, 19,922.54 and 3,420.72 is: 5,131.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.70 : 19,922.54 = 3,420.72 : x
  2. Step 2: Convert to fraction form
    13,281.70/19,922.54 = 3,420.72/x
  3. Step 3: Cross multiply
    13,281.70x = 19,922.54 × 3,420.72
  4. Step 4: Simplify right side
    13,281.70x = 68,149,419.58
  5. Step 5: Solve for x
    x = 68,149,419.58/13,281.70
  6. Step 6: Final answer
    x = 5,131.08

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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.