Home / 21,570.24-29,766.87-12,138.81

Finding the Fourth Proportional to 21,570.24, 29,766.87 and 12,138.81

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Solution

The fourth proportional to 21,570.24, 29,766.87 and 12,138.81 is: 16,751.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,570.24 : 29,766.87 = 12,138.81 : x
  2. Step 2: Convert to fraction form
    21,570.24/29,766.87 = 12,138.81/x
  3. Step 3: Cross multiply
    21,570.24x = 29,766.87 × 12,138.81
  4. Step 4: Simplify right side
    21,570.24x = 361,334,379.22
  5. Step 5: Solve for x
    x = 361,334,379.22/21,570.24
  6. Step 6: Final answer
    x = 16,751.52

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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.