Home / 28,387.68-39,173.45-15,640.41

Finding the Fourth Proportional to 28,387.68, 39,173.45 and 15,640.41

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Solution

The fourth proportional to 28,387.68, 39,173.45 and 15,640.41 is: 21,582.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,387.68 : 39,173.45 = 15,640.41 : x
  2. Step 2: Convert to fraction form
    28,387.68/39,173.45 = 15,640.41/x
  3. Step 3: Cross multiply
    28,387.68x = 39,173.45 × 15,640.41
  4. Step 4: Simplify right side
    28,387.68x = 612,688,740.91
  5. Step 5: Solve for x
    x = 612,688,740.91/28,387.68
  6. Step 6: Final answer
    x = 21,582.91

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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.