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Finding the Fourth Proportional to 7,220.95, 10,831.44 and 1,955.99

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Solution

The fourth proportional to 7,220.95, 10,831.44 and 1,955.99 is: 2,933.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,220.95 : 10,831.44 = 1,955.99 : x
  2. Step 2: Convert to fraction form
    7,220.95/10,831.44 = 1,955.99/x
  3. Step 3: Cross multiply
    7,220.95x = 10,831.44 × 1,955.99
  4. Step 4: Simplify right side
    7,220.95x = 21,186,222.74
  5. Step 5: Solve for x
    x = 21,186,222.74/7,220.95
  6. Step 6: Final answer
    x = 2,933.99

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Similar ratio
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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.