Home / 28,439.69-42,665.76-8,719.79

Finding the Fourth Proportional to 28,439.69, 42,665.76 and 8,719.79

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Solution

The fourth proportional to 28,439.69, 42,665.76 and 8,719.79 is: 13,081.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.69 : 42,665.76 = 8,719.79 : x
  2. Step 2: Convert to fraction form
    28,439.69/42,665.76 = 8,719.79/x
  3. Step 3: Cross multiply
    28,439.69x = 42,665.76 × 8,719.79
  4. Step 4: Simplify right side
    28,439.69x = 372,036,254.06
  5. Step 5: Solve for x
    x = 372,036,254.06/28,439.69
  6. Step 6: Final answer
    x = 13,081.59

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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.