Home / 19,679.99-27,158.90-12,131.31

Finding the Fourth Proportional to 19,679.99, 27,158.90 and 12,131.31

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Solution

The fourth proportional to 19,679.99, 27,158.90 and 12,131.31 is: 16,741.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,679.99 : 27,158.90 = 12,131.31 : x
  2. Step 2: Convert to fraction form
    19,679.99/27,158.90 = 12,131.31/x
  3. Step 3: Cross multiply
    19,679.99x = 27,158.90 × 12,131.31
  4. Step 4: Simplify right side
    19,679.99x = 329,473,065.49
  5. Step 5: Solve for x
    x = 329,473,065.49/19,679.99
  6. Step 6: Final answer
    x = 16,741.52

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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.