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Finding the Fourth Proportional to 18,698.20, 28,045.14 and 5,549.20

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Solution

The fourth proportional to 18,698.20, 28,045.14 and 5,549.20 is: 8,323.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.20 : 28,045.14 = 5,549.20 : x
  2. Step 2: Convert to fraction form
    18,698.20/28,045.14 = 5,549.20/x
  3. Step 3: Cross multiply
    18,698.20x = 28,045.14 × 5,549.20
  4. Step 4: Simplify right side
    18,698.20x = 155,628,090.89
  5. Step 5: Solve for x
    x = 155,628,090.89/18,698.20
  6. Step 6: Final answer
    x = 8,323.16

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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.