Home / 21,080.66-31,605.43-12,758.85

Finding the Fourth Proportional to 21,080.66, 31,605.43 and 12,758.85

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Solution

The fourth proportional to 21,080.66, 31,605.43 and 12,758.85 is: 19,128.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.66 : 31,605.43 = 12,758.85 : x
  2. Step 2: Convert to fraction form
    21,080.66/31,605.43 = 12,758.85/x
  3. Step 3: Cross multiply
    21,080.66x = 31,605.43 × 12,758.85
  4. Step 4: Simplify right side
    21,080.66x = 403,248,908.66
  5. Step 5: Solve for x
    x = 403,248,908.66/21,080.66
  6. Step 6: Final answer
    x = 19,128.85

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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.