Home / 20,979.72-31,460.37-11,116.74

Finding the Fourth Proportional to 20,979.72, 31,460.37 and 11,116.74

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Solution

The fourth proportional to 20,979.72, 31,460.37 and 11,116.74 is: 16,670.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.72 : 31,460.37 = 11,116.74 : x
  2. Step 2: Convert to fraction form
    20,979.72/31,460.37 = 11,116.74/x
  3. Step 3: Cross multiply
    20,979.72x = 31,460.37 × 11,116.74
  4. Step 4: Simplify right side
    20,979.72x = 349,736,753.59
  5. Step 5: Solve for x
    x = 349,736,753.59/20,979.72
  6. Step 6: Final answer
    x = 16,670.23

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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.