Home / 21,125.50-29,160.53-13,065.33

Finding the Fourth Proportional to 21,125.50, 29,160.53 and 13,065.33

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Solution

The fourth proportional to 21,125.50, 29,160.53 and 13,065.33 is: 18,034.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.50 : 29,160.53 = 13,065.33 : x
  2. Step 2: Convert to fraction form
    21,125.50/29,160.53 = 13,065.33/x
  3. Step 3: Cross multiply
    21,125.50x = 29,160.53 × 13,065.33
  4. Step 4: Simplify right side
    21,125.50x = 380,991,947.42
  5. Step 5: Solve for x
    x = 380,991,947.42/21,125.50
  6. Step 6: Final answer
    x = 18,034.69

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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.