Home / 28,637.69-39,520.22-15,890.92

Finding the Fourth Proportional to 28,637.69, 39,520.22 and 15,890.92

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Solution

The fourth proportional to 28,637.69, 39,520.22 and 15,890.92 is: 21,929.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,637.69 : 39,520.22 = 15,890.92 : x
  2. Step 2: Convert to fraction form
    28,637.69/39,520.22 = 15,890.92/x
  3. Step 3: Cross multiply
    28,637.69x = 39,520.22 × 15,890.92
  4. Step 4: Simplify right side
    28,637.69x = 628,012,476.15
  5. Step 5: Solve for x
    x = 628,012,476.15/28,637.69
  6. Step 6: Final answer
    x = 21,929.58

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Double scale
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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.