Home / 39,221.72-54,126.38-21,316.71

Finding the Fourth Proportional to 39,221.72, 54,126.38 and 21,316.71

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Solution

The fourth proportional to 39,221.72, 54,126.38 and 21,316.71 is: 29,417.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,221.72 : 54,126.38 = 21,316.71 : x
  2. Step 2: Convert to fraction form
    39,221.72/54,126.38 = 21,316.71/x
  3. Step 3: Cross multiply
    39,221.72x = 54,126.38 × 21,316.71
  4. Step 4: Simplify right side
    39,221.72x = 1,153,796,239.23
  5. Step 5: Solve for x
    x = 1,153,796,239.23/39,221.72
  6. Step 6: Final answer
    x = 29,417.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.