Home / 39,121.21-53,987.20-21,216.18

Finding the Fourth Proportional to 39,121.21, 53,987.20 and 21,216.18

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Solution

The fourth proportional to 39,121.21, 53,987.20 and 21,216.18 is: 29,278.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,121.21 : 53,987.20 = 21,216.18 : x
  2. Step 2: Convert to fraction form
    39,121.21/53,987.20 = 21,216.18/x
  3. Step 3: Cross multiply
    39,121.21x = 53,987.20 × 21,216.18
  4. Step 4: Simplify right side
    39,121.21x = 1,145,402,152.90
  5. Step 5: Solve for x
    x = 1,145,402,152.90/39,121.21
  6. Step 6: Final answer
    x = 29,278.29

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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.