Home / 28,748.68-39,662.16-21,212.96

Finding the Fourth Proportional to 28,748.68, 39,662.16 and 21,212.96

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Solution

The fourth proportional to 28,748.68, 39,662.16 and 21,212.96 is: 29,265.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,748.68 : 39,662.16 = 21,212.96 : x
  2. Step 2: Convert to fraction form
    28,748.68/39,662.16 = 21,212.96/x
  3. Step 3: Cross multiply
    28,748.68x = 39,662.16 × 21,212.96
  4. Step 4: Simplify right side
    28,748.68x = 841,351,813.59
  5. Step 5: Solve for x
    x = 841,351,813.59/28,748.68
  6. Step 6: Final answer
    x = 29,265.75

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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.