Home / 28,442.14-42,661.62-8,720.65

Finding the Fourth Proportional to 28,442.14, 42,661.62 and 8,720.65

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Solution

The fourth proportional to 28,442.14, 42,661.62 and 8,720.65 is: 13,080.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.14 : 42,661.62 = 8,720.65 : x
  2. Step 2: Convert to fraction form
    28,442.14/42,661.62 = 8,720.65/x
  3. Step 3: Cross multiply
    28,442.14x = 42,661.62 × 8,720.65
  4. Step 4: Simplify right side
    28,442.14x = 372,036,869.81
  5. Step 5: Solve for x
    x = 372,036,869.81/28,442.14
  6. Step 6: Final answer
    x = 13,080.48

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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.