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Finding the Fourth Proportional to 18,878.03, 28,322.51 and 7,188.51

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Solution

The fourth proportional to 18,878.03, 28,322.51 and 7,188.51 is: 10,784.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.03 : 28,322.51 = 7,188.51 : x
  2. Step 2: Convert to fraction form
    18,878.03/28,322.51 = 7,188.51/x
  3. Step 3: Cross multiply
    18,878.03x = 28,322.51 × 7,188.51
  4. Step 4: Simplify right side
    18,878.03x = 203,596,646.36
  5. Step 5: Solve for x
    x = 203,596,646.36/18,878.03
  6. Step 6: Final answer
    x = 10,784.85

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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.