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Finding the Fourth Proportional to 18,858.32, 28,287.47 and 5,007.32

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Solution

The fourth proportional to 18,858.32, 28,287.47 and 5,007.32 is: 7,510.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.32 : 28,287.47 = 5,007.32 : x
  2. Step 2: Convert to fraction form
    18,858.32/28,287.47 = 5,007.32/x
  3. Step 3: Cross multiply
    18,858.32x = 28,287.47 × 5,007.32
  4. Step 4: Simplify right side
    18,858.32x = 141,644,272.84
  5. Step 5: Solve for x
    x = 141,644,272.84/18,858.32
  6. Step 6: Final answer
    x = 7,510.97

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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.