Home / 37,890-52,288.56-21,123.36

Finding the Fourth Proportional to 37,890, 52,288.56 and 21,123.36

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Solution

The fourth proportional to 37,890, 52,288.56 and 21,123.36 is: 29,150.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,890 : 52,288.56 = 21,123.36 : x
  2. Step 2: Convert to fraction form
    37,890/52,288.56 = 21,123.36/x
  3. Step 3: Cross multiply
    37,890x = 52,288.56 × 21,123.36
  4. Step 4: Simplify right side
    37,890x = 1,104,510,076.76
  5. Step 5: Solve for x
    x = 1,104,510,076.76/37,890
  6. Step 6: Final answer
    x = 29,150.44

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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.