Home / 28,095.84-38,771.88-15,520.80

Finding the Fourth Proportional to 28,095.84, 38,771.88 and 15,520.80

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Solution

The fourth proportional to 28,095.84, 38,771.88 and 15,520.80 is: 21,418.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,095.84 : 38,771.88 = 15,520.80 : x
  2. Step 2: Convert to fraction form
    28,095.84/38,771.88 = 15,520.80/x
  3. Step 3: Cross multiply
    28,095.84x = 38,771.88 × 15,520.80
  4. Step 4: Simplify right side
    28,095.84x = 601,770,595.10
  5. Step 5: Solve for x
    x = 601,770,595.10/28,095.84
  6. Step 6: Final answer
    x = 21,418.49

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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.