Home / 15,935.09-21,990.11-8,861.36

Finding the Fourth Proportional to 15,935.09, 21,990.11 and 8,861.36

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Solution

The fourth proportional to 15,935.09, 21,990.11 and 8,861.36 is: 12,228.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,935.09 : 21,990.11 = 8,861.36 : x
  2. Step 2: Convert to fraction form
    15,935.09/21,990.11 = 8,861.36/x
  3. Step 3: Cross multiply
    15,935.09x = 21,990.11 × 8,861.36
  4. Step 4: Simplify right side
    15,935.09x = 194,862,126.89
  5. Step 5: Solve for x
    x = 194,862,126.89/15,935.09
  6. Step 6: Final answer
    x = 12,228.50

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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.