Home / 21,123.25-29,148.09-12,623.68

Finding the Fourth Proportional to 21,123.25, 29,148.09 and 12,623.68

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Solution

The fourth proportional to 21,123.25, 29,148.09 and 12,623.68 is: 17,419.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123.25 : 29,148.09 = 12,623.68 : x
  2. Step 2: Convert to fraction form
    21,123.25/29,148.09 = 12,623.68/x
  3. Step 3: Cross multiply
    21,123.25x = 29,148.09 × 12,623.68
  4. Step 4: Simplify right side
    21,123.25x = 367,956,040.56
  5. Step 5: Solve for x
    x = 367,956,040.56/21,123.25
  6. Step 6: Final answer
    x = 17,419.48

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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.