Home / 21,520.67-29,700.83-12,571.08

Finding the Fourth Proportional to 21,520.67, 29,700.83 and 12,571.08

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Solution

The fourth proportional to 21,520.67, 29,700.83 and 12,571.08 is: 17,349.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.67 : 29,700.83 = 12,571.08 : x
  2. Step 2: Convert to fraction form
    21,520.67/29,700.83 = 12,571.08/x
  3. Step 3: Cross multiply
    21,520.67x = 29,700.83 × 12,571.08
  4. Step 4: Simplify right side
    21,520.67x = 373,371,447.14
  5. Step 5: Solve for x
    x = 373,371,447.14/21,520.67
  6. Step 6: Final answer
    x = 17,349.44

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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.