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Finding the Fourth Proportional to 18,820.69, 28,200.44 and 9,935.53

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Solution

The fourth proportional to 18,820.69, 28,200.44 and 9,935.53 is: 14,887.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.69 : 28,200.44 = 9,935.53 : x
  2. Step 2: Convert to fraction form
    18,820.69/28,200.44 = 9,935.53/x
  3. Step 3: Cross multiply
    18,820.69x = 28,200.44 × 9,935.53
  4. Step 4: Simplify right side
    18,820.69x = 280,186,271.97
  5. Step 5: Solve for x
    x = 280,186,271.97/18,820.69
  6. Step 6: Final answer
    x = 14,887.14

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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.