Home / 21,008.68-31,511.10-12,238.12

Finding the Fourth Proportional to 21,008.68, 31,511.10 and 12,238.12

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Solution

The fourth proportional to 21,008.68, 31,511.10 and 12,238.12 is: 18,356.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.68 : 31,511.10 = 12,238.12 : x
  2. Step 2: Convert to fraction form
    21,008.68/31,511.10 = 12,238.12/x
  3. Step 3: Cross multiply
    21,008.68x = 31,511.10 × 12,238.12
  4. Step 4: Simplify right side
    21,008.68x = 385,636,623.13
  5. Step 5: Solve for x
    x = 385,636,623.13/21,008.68
  6. Step 6: Final answer
    x = 18,356.06

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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.