Home / 14,279.78-19,706.16-7,991.76

Finding the Fourth Proportional to 14,279.78, 19,706.16 and 7,991.76

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Solution

The fourth proportional to 14,279.78, 19,706.16 and 7,991.76 is: 11,028.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,279.78 : 19,706.16 = 7,991.76 : x
  2. Step 2: Convert to fraction form
    14,279.78/19,706.16 = 7,991.76/x
  3. Step 3: Cross multiply
    14,279.78x = 19,706.16 × 7,991.76
  4. Step 4: Simplify right side
    14,279.78x = 157,486,901.24
  5. Step 5: Solve for x
    x = 157,486,901.24/14,279.78
  6. Step 6: Final answer
    x = 11,028.66

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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.