Home / 28,415.43-39,211.70-15,668.19

Finding the Fourth Proportional to 28,415.43, 39,211.70 and 15,668.19

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Solution

The fourth proportional to 28,415.43, 39,211.70 and 15,668.19 is: 21,621.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.43 : 39,211.70 = 15,668.19 : x
  2. Step 2: Convert to fraction form
    28,415.43/39,211.70 = 15,668.19/x
  3. Step 3: Cross multiply
    28,415.43x = 39,211.70 × 15,668.19
  4. Step 4: Simplify right side
    28,415.43x = 614,376,287.48
  5. Step 5: Solve for x
    x = 614,376,287.48/28,415.43
  6. Step 6: Final answer
    x = 21,621.22

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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.