Home / 18,875.12-28,316.30-7,187.36

Finding the Fourth Proportional to 18,875.12, 28,316.30 and 7,187.36

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Solution

The fourth proportional to 18,875.12, 28,316.30 and 7,187.36 is: 10,782.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.12 : 28,316.30 = 7,187.36 : x
  2. Step 2: Convert to fraction form
    18,875.12/28,316.30 = 7,187.36/x
  3. Step 3: Cross multiply
    18,875.12x = 28,316.30 × 7,187.36
  4. Step 4: Simplify right side
    18,875.12x = 203,519,441.97
  5. Step 5: Solve for x
    x = 203,519,441.97/18,875.12
  6. Step 6: Final answer
    x = 10,782.42

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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.