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Finding the Fourth Proportional to 18,795.40, 28,112.10 and 16,835.20

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Solution

The fourth proportional to 18,795.40, 28,112.10 and 16,835.20 is: 25,180.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,795.40 : 28,112.10 = 16,835.20 : x
  2. Step 2: Convert to fraction form
    18,795.40/28,112.10 = 16,835.20/x
  3. Step 3: Cross multiply
    18,795.40x = 28,112.10 × 16,835.20
  4. Step 4: Simplify right side
    18,795.40x = 473,272,825.92
  5. Step 5: Solve for x
    x = 473,272,825.92/18,795.40
  6. Step 6: Final answer
    x = 25,180.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.