Home / 21,229.16-31,831.02-7,185.15

Finding the Fourth Proportional to 21,229.16, 31,831.02 and 7,185.15

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Solution

The fourth proportional to 21,229.16, 31,831.02 and 7,185.15 is: 10,773.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,229.16 : 31,831.02 = 7,185.15 : x
  2. Step 2: Convert to fraction form
    21,229.16/31,831.02 = 7,185.15/x
  3. Step 3: Cross multiply
    21,229.16x = 31,831.02 × 7,185.15
  4. Step 4: Simplify right side
    21,229.16x = 228,710,653.35
  5. Step 5: Solve for x
    x = 228,710,653.35/21,229.16
  6. Step 6: Final answer
    x = 10,773.42

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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.