Home / 20,919.48-31,379.23-13,133.76

Finding the Fourth Proportional to 20,919.48, 31,379.23 and 13,133.76

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Solution

The fourth proportional to 20,919.48, 31,379.23 and 13,133.76 is: 19,700.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.48 : 31,379.23 = 13,133.76 : x
  2. Step 2: Convert to fraction form
    20,919.48/31,379.23 = 13,133.76/x
  3. Step 3: Cross multiply
    20,919.48x = 31,379.23 × 13,133.76
  4. Step 4: Simplify right side
    20,919.48x = 412,127,292.22
  5. Step 5: Solve for x
    x = 412,127,292.22/20,919.48
  6. Step 6: Final answer
    x = 19,700.65

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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.