Home / 21,161.59-31,699.33-13,743.56

Finding the Fourth Proportional to 21,161.59, 31,699.33 and 13,743.56

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Solution

The fourth proportional to 21,161.59, 31,699.33 and 13,743.56 is: 20,587.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.59 : 31,699.33 = 13,743.56 : x
  2. Step 2: Convert to fraction form
    21,161.59/31,699.33 = 13,743.56/x
  3. Step 3: Cross multiply
    21,161.59x = 31,699.33 × 13,743.56
  4. Step 4: Simplify right side
    21,161.59x = 435,661,643.81
  5. Step 5: Solve for x
    x = 435,661,643.81/21,161.59
  6. Step 6: Final answer
    x = 20,587.38

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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.