Home / 31,221.18-43,100.10-19,291.50

Finding the Fourth Proportional to 31,221.18, 43,100.10 and 19,291.50

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Solution

The fourth proportional to 31,221.18, 43,100.10 and 19,291.50 is: 26,631.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,221.18 : 43,100.10 = 19,291.50 : x
  2. Step 2: Convert to fraction form
    31,221.18/43,100.10 = 19,291.50/x
  3. Step 3: Cross multiply
    31,221.18x = 43,100.10 × 19,291.50
  4. Step 4: Simplify right side
    31,221.18x = 831,465,579.15
  5. Step 5: Solve for x
    x = 831,465,579.15/31,221.18
  6. Step 6: Final answer
    x = 26,631.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.