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Finding the Fourth Proportional to 18,740.40, 28,110.60 and 10,867.20

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Solution

The fourth proportional to 18,740.40, 28,110.60 and 10,867.20 is: 16,300.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,740.40 : 28,110.60 = 10,867.20 : x
  2. Step 2: Convert to fraction form
    18,740.40/28,110.60 = 10,867.20/x
  3. Step 3: Cross multiply
    18,740.40x = 28,110.60 × 10,867.20
  4. Step 4: Simplify right side
    18,740.40x = 305,483,512.32
  5. Step 5: Solve for x
    x = 305,483,512.32/18,740.40
  6. Step 6: Final answer
    x = 16,300.80

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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.