Home / 21,406.85-29,553.32-12,911.13

Finding the Fourth Proportional to 21,406.85, 29,553.32 and 12,911.13

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Solution

The fourth proportional to 21,406.85, 29,553.32 and 12,911.13 is: 17,824.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,406.85 : 29,553.32 = 12,911.13 : x
  2. Step 2: Convert to fraction form
    21,406.85/29,553.32 = 12,911.13/x
  3. Step 3: Cross multiply
    21,406.85x = 29,553.32 × 12,911.13
  4. Step 4: Simplify right side
    21,406.85x = 381,566,756.45
  5. Step 5: Solve for x
    x = 381,566,756.45/21,406.85
  6. Step 6: Final answer
    x = 17,824.52

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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.