Home / 31,320.10-43,238.40-21,302.02

Finding the Fourth Proportional to 31,320.10, 43,238.40 and 21,302.02

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Solution

The fourth proportional to 31,320.10, 43,238.40 and 21,302.02 is: 29,408.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,320.10 : 43,238.40 = 21,302.02 : x
  2. Step 2: Convert to fraction form
    31,320.10/43,238.40 = 21,302.02/x
  3. Step 3: Cross multiply
    31,320.10x = 43,238.40 × 21,302.02
  4. Step 4: Simplify right side
    31,320.10x = 921,065,261.57
  5. Step 5: Solve for x
    x = 921,065,261.57/31,320.10
  6. Step 6: Final answer
    x = 29,408.12

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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.