Home / 21,239.18-29,310.18-11,807.76

Finding the Fourth Proportional to 21,239.18, 29,310.18 and 11,807.76

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Solution

The fourth proportional to 21,239.18, 29,310.18 and 11,807.76 is: 16,294.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.18 : 29,310.18 = 11,807.76 : x
  2. Step 2: Convert to fraction form
    21,239.18/29,310.18 = 11,807.76/x
  3. Step 3: Cross multiply
    21,239.18x = 29,310.18 × 11,807.76
  4. Step 4: Simplify right side
    21,239.18x = 346,087,571.00
  5. Step 5: Solve for x
    x = 346,087,571.00/21,239.18
  6. Step 6: Final answer
    x = 16,294.77

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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.