Home / 28,296.96-39,050.16-15,721.68

Finding the Fourth Proportional to 28,296.96, 39,050.16 and 15,721.68

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Solution

The fourth proportional to 28,296.96, 39,050.16 and 15,721.68 is: 21,696.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,296.96 : 39,050.16 = 15,721.68 : x
  2. Step 2: Convert to fraction form
    28,296.96/39,050.16 = 15,721.68/x
  3. Step 3: Cross multiply
    28,296.96x = 39,050.16 × 15,721.68
  4. Step 4: Simplify right side
    28,296.96x = 613,934,119.47
  5. Step 5: Solve for x
    x = 613,934,119.47/28,296.96
  6. Step 6: Final answer
    x = 21,696.12

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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.