Home / 21,219.81-31,822.19-6,222.75

Finding the Fourth Proportional to 21,219.81, 31,822.19 and 6,222.75

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Solution

The fourth proportional to 21,219.81, 31,822.19 and 6,222.75 is: 9,331.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.81 : 31,822.19 = 6,222.75 : x
  2. Step 2: Convert to fraction form
    21,219.81/31,822.19 = 6,222.75/x
  3. Step 3: Cross multiply
    21,219.81x = 31,822.19 × 6,222.75
  4. Step 4: Simplify right side
    21,219.81x = 198,021,501.71
  5. Step 5: Solve for x
    x = 198,021,501.71/21,219.81
  6. Step 6: Final answer
    x = 9,331.92

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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.