Home / 31,237.36-43,123.12-21,218.56

Finding the Fourth Proportional to 31,237.36, 43,123.12 and 21,218.56

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Solution

The fourth proportional to 31,237.36, 43,123.12 and 21,218.56 is: 29,292.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,237.36 : 43,123.12 = 21,218.56 : x
  2. Step 2: Convert to fraction form
    31,237.36/43,123.12 = 21,218.56/x
  3. Step 3: Cross multiply
    31,237.36x = 43,123.12 × 21,218.56
  4. Step 4: Simplify right side
    31,237.36x = 915,010,509.11
  5. Step 5: Solve for x
    x = 915,010,509.11/31,237.36
  6. Step 6: Final answer
    x = 29,292.18

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1.5x scale

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.