Home / 20,918.07-31,385.79-11,557.24

Finding the Fourth Proportional to 20,918.07, 31,385.79 and 11,557.24

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Solution

The fourth proportional to 20,918.07, 31,385.79 and 11,557.24 is: 17,340.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.07 : 31,385.79 = 11,557.24 : x
  2. Step 2: Convert to fraction form
    20,918.07/31,385.79 = 11,557.24/x
  3. Step 3: Cross multiply
    20,918.07x = 31,385.79 × 11,557.24
  4. Step 4: Simplify right side
    20,918.07x = 362,733,029.16
  5. Step 5: Solve for x
    x = 362,733,029.16/20,918.07
  6. Step 6: Final answer
    x = 17,340.65

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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.