Home / 13,291.40-19,938.11-3,430.66

Finding the Fourth Proportional to 13,291.40, 19,938.11 and 3,430.66

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Solution

The fourth proportional to 13,291.40, 19,938.11 and 3,430.66 is: 5,146.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.40 : 19,938.11 = 3,430.66 : x
  2. Step 2: Convert to fraction form
    13,291.40/19,938.11 = 3,430.66/x
  3. Step 3: Cross multiply
    13,291.40x = 19,938.11 × 3,430.66
  4. Step 4: Simplify right side
    13,291.40x = 68,400,876.45
  5. Step 5: Solve for x
    x = 68,400,876.45/13,291.40
  6. Step 6: Final answer
    x = 5,146.25

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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.