Home / 14,123.45-21,192.13-9,990.02

Finding the Fourth Proportional to 14,123.45, 21,192.13 and 9,990.02

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Solution

The fourth proportional to 14,123.45, 21,192.13 and 9,990.02 is: 14,989.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,123.45 : 21,192.13 = 9,990.02 : x
  2. Step 2: Convert to fraction form
    14,123.45/21,192.13 = 9,990.02/x
  3. Step 3: Cross multiply
    14,123.45x = 21,192.13 × 9,990.02
  4. Step 4: Simplify right side
    14,123.45x = 211,709,868.01
  5. Step 5: Solve for x
    x = 211,709,868.01/14,123.45
  6. Step 6: Final answer
    x = 14,989.95

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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.