Home / 28,188.75-42,289.61-9,720.75

Finding the Fourth Proportional to 28,188.75, 42,289.61 and 9,720.75

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Solution

The fourth proportional to 28,188.75, 42,289.61 and 9,720.75 is: 14,583.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188.75 : 42,289.61 = 9,720.75 : x
  2. Step 2: Convert to fraction form
    28,188.75/42,289.61 = 9,720.75/x
  3. Step 3: Cross multiply
    28,188.75x = 42,289.61 × 9,720.75
  4. Step 4: Simplify right side
    28,188.75x = 411,086,677.80
  5. Step 5: Solve for x
    x = 411,086,677.80/28,188.75
  6. Step 6: Final answer
    x = 14,583.36

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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.