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Finding the Fourth Proportional to 18,975.92, 28,459.60 and 5,646.20

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Solution

The fourth proportional to 18,975.92, 28,459.60 and 5,646.20 is: 8,468.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,975.92 : 28,459.60 = 5,646.20 : x
  2. Step 2: Convert to fraction form
    18,975.92/28,459.60 = 5,646.20/x
  3. Step 3: Cross multiply
    18,975.92x = 28,459.60 × 5,646.20
  4. Step 4: Simplify right side
    18,975.92x = 160,688,593.52
  5. Step 5: Solve for x
    x = 160,688,593.52/18,975.92
  6. Step 6: Final answer
    x = 8,468.03

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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.