Home / 21,101.70-29,123.51-13,146.49

Finding the Fourth Proportional to 21,101.70, 29,123.51 and 13,146.49

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Solution

The fourth proportional to 21,101.70, 29,123.51 and 13,146.49 is: 18,144.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.70 : 29,123.51 = 13,146.49 : x
  2. Step 2: Convert to fraction form
    21,101.70/29,123.51 = 13,146.49/x
  3. Step 3: Cross multiply
    21,101.70x = 29,123.51 × 13,146.49
  4. Step 4: Simplify right side
    21,101.70x = 382,871,794.44
  5. Step 5: Solve for x
    x = 382,871,794.44/21,101.70
  6. Step 6: Final answer
    x = 18,144.12

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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.