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Finding the Fourth Proportional to 18,220.70, 25,578.10 and 18,220.70

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Solution

The fourth proportional to 18,220.70, 25,578.10 and 18,220.70 is: 25,578.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.70 : 25,578.10 = 18,220.70 : x
  2. Step 2: Convert to fraction form
    18,220.70/25,578.10 = 18,220.70/x
  3. Step 3: Cross multiply
    18,220.70x = 25,578.10 × 18,220.70
  4. Step 4: Simplify right side
    18,220.70x = 466,050,886.67
  5. Step 5: Solve for x
    x = 466,050,886.67/18,220.70
  6. Step 6: Final answer
    x = 25,578.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.