Home / 20,979.60-31,460.18-11,116.63

Finding the Fourth Proportional to 20,979.60, 31,460.18 and 11,116.63

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Solution

The fourth proportional to 20,979.60, 31,460.18 and 11,116.63 is: 16,670.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.60 : 31,460.18 = 11,116.63 : x
  2. Step 2: Convert to fraction form
    20,979.60/31,460.18 = 11,116.63/x
  3. Step 3: Cross multiply
    20,979.60x = 31,460.18 × 11,116.63
  4. Step 4: Simplify right side
    20,979.60x = 349,731,180.79
  5. Step 5: Solve for x
    x = 349,731,180.79/20,979.60
  6. Step 6: Final answer
    x = 16,670.06

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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.