Home / 39,129.16-53,997.40-21,223.48

Finding the Fourth Proportional to 39,129.16, 53,997.40 and 21,223.48

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Solution

The fourth proportional to 39,129.16, 53,997.40 and 21,223.48 is: 29,287.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,129.16 : 53,997.40 = 21,223.48 : x
  2. Step 2: Convert to fraction form
    39,129.16/53,997.40 = 21,223.48/x
  3. Step 3: Cross multiply
    39,129.16x = 53,997.40 × 21,223.48
  4. Step 4: Simplify right side
    39,129.16x = 1,146,012,738.95
  5. Step 5: Solve for x
    x = 1,146,012,738.95/39,129.16
  6. Step 6: Final answer
    x = 29,287.95

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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.