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Finding the Fourth Proportional to 18,866.70, 28,300.01 and 5,015.70

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Solution

The fourth proportional to 18,866.70, 28,300.01 and 5,015.70 is: 7,523.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.70 : 28,300.01 = 5,015.70 : x
  2. Step 2: Convert to fraction form
    18,866.70/28,300.01 = 5,015.70/x
  3. Step 3: Cross multiply
    18,866.70x = 28,300.01 × 5,015.70
  4. Step 4: Simplify right side
    18,866.70x = 141,944,218.66
  5. Step 5: Solve for x
    x = 141,944,218.66/18,866.70
  6. Step 6: Final answer
    x = 7,523.53

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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.