Home / 20,739.39-31,108.40-11,383.82

Finding the Fourth Proportional to 20,739.39, 31,108.40 and 11,383.82

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Solution

The fourth proportional to 20,739.39, 31,108.40 and 11,383.82 is: 17,075.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.39 : 31,108.40 = 11,383.82 : x
  2. Step 2: Convert to fraction form
    20,739.39/31,108.40 = 11,383.82/x
  3. Step 3: Cross multiply
    20,739.39x = 31,108.40 × 11,383.82
  4. Step 4: Simplify right side
    20,739.39x = 354,132,349.51
  5. Step 5: Solve for x
    x = 354,132,349.51/20,739.39
  6. Step 6: Final answer
    x = 17,075.35

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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.