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Finding the Fourth Proportional to 28,000, 42,000.18 and 7,223.68

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Solution

The fourth proportional to 28,000, 42,000.18 and 7,223.68 is: 10,835.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000 : 42,000.18 = 7,223.68 : x
  2. Step 2: Convert to fraction form
    28,000/42,000.18 = 7,223.68/x
  3. Step 3: Cross multiply
    28,000x = 42,000.18 × 7,223.68
  4. Step 4: Simplify right side
    28,000x = 303,395,860.26
  5. Step 5: Solve for x
    x = 303,395,860.26/28,000
  6. Step 6: Final answer
    x = 10,835.57

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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.