Home / 39,291.68-54,221.36-21,386.28

Finding the Fourth Proportional to 39,291.68, 54,221.36 and 21,386.28

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Solution

The fourth proportional to 39,291.68, 54,221.36 and 21,386.28 is: 29,512.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,291.68 : 54,221.36 = 21,386.28 : x
  2. Step 2: Convert to fraction form
    39,291.68/54,221.36 = 21,386.28/x
  3. Step 3: Cross multiply
    39,291.68x = 54,221.36 × 21,386.28
  4. Step 4: Simplify right side
    39,291.68x = 1,159,593,186.94
  5. Step 5: Solve for x
    x = 1,159,593,186.94/39,291.68
  6. Step 6: Final answer
    x = 29,512.44

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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.