Home / 20,979.15-31,457.89-6,186.19

Finding the Fourth Proportional to 20,979.15, 31,457.89 and 6,186.19

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Solution

The fourth proportional to 20,979.15, 31,457.89 and 6,186.19 is: 9,276.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.15 : 31,457.89 = 6,186.19 : x
  2. Step 2: Convert to fraction form
    20,979.15/31,457.89 = 6,186.19/x
  3. Step 3: Cross multiply
    20,979.15x = 31,457.89 × 6,186.19
  4. Step 4: Simplify right side
    20,979.15x = 194,604,296.32
  5. Step 5: Solve for x
    x = 194,604,296.32/20,979.15
  6. Step 6: Final answer
    x = 9,276.08

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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.