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Finding the Fourth Proportional to 18,703.60, 28,055.20 and 5,556.08

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Solution

The fourth proportional to 18,703.60, 28,055.20 and 5,556.08 is: 8,334.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.60 : 28,055.20 = 5,556.08 : x
  2. Step 2: Convert to fraction form
    18,703.60/28,055.20 = 5,556.08/x
  3. Step 3: Cross multiply
    18,703.60x = 28,055.20 × 5,556.08
  4. Step 4: Simplify right side
    18,703.60x = 155,876,935.62
  5. Step 5: Solve for x
    x = 155,876,935.62/18,703.60
  6. Step 6: Final answer
    x = 8,334.06

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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.