Home / 13,319.65-19,979.47-3,959.63

Finding the Fourth Proportional to 13,319.65, 19,979.47 and 3,959.63

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Solution

The fourth proportional to 13,319.65, 19,979.47 and 3,959.63 is: 5,939.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.65 : 19,979.47 = 3,959.63 : x
  2. Step 2: Convert to fraction form
    13,319.65/19,979.47 = 3,959.63/x
  3. Step 3: Cross multiply
    13,319.65x = 19,979.47 × 3,959.63
  4. Step 4: Simplify right side
    13,319.65x = 79,111,288.77
  5. Step 5: Solve for x
    x = 79,111,288.77/13,319.65
  6. Step 6: Final answer
    x = 5,939.44

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Similar ratio
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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.