Home / 18,875.19-28,316.19-7,775.82

Finding the Fourth Proportional to 18,875.19, 28,316.19 and 7,775.82

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Solution

The fourth proportional to 18,875.19, 28,316.19 and 7,775.82 is: 11,665.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.19 : 28,316.19 = 7,775.82 : x
  2. Step 2: Convert to fraction form
    18,875.19/28,316.19 = 7,775.82/x
  3. Step 3: Cross multiply
    18,875.19x = 28,316.19 × 7,775.82
  4. Step 4: Simplify right side
    18,875.19x = 220,181,596.53
  5. Step 5: Solve for x
    x = 220,181,596.53/18,875.19
  6. Step 6: Final answer
    x = 11,665.13

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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.