Home / 21,067.53-31,607.15-9,219.18

Finding the Fourth Proportional to 21,067.53, 31,607.15 and 9,219.18

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Solution

The fourth proportional to 21,067.53, 31,607.15 and 9,219.18 is: 13,831.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,067.53 : 31,607.15 = 9,219.18 : x
  2. Step 2: Convert to fraction form
    21,067.53/31,607.15 = 9,219.18/x
  3. Step 3: Cross multiply
    21,067.53x = 31,607.15 × 9,219.18
  4. Step 4: Simplify right side
    21,067.53x = 291,391,959.04
  5. Step 5: Solve for x
    x = 291,391,959.04/21,067.53
  6. Step 6: Final answer
    x = 13,831.33

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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.