Home / 14,279.19-19,705.40-7,991.55

Finding the Fourth Proportional to 14,279.19, 19,705.40 and 7,991.55

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Solution

The fourth proportional to 14,279.19, 19,705.40 and 7,991.55 is: 11,028.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,279.19 : 19,705.40 = 7,991.55 : x
  2. Step 2: Convert to fraction form
    14,279.19/19,705.40 = 7,991.55/x
  3. Step 3: Cross multiply
    14,279.19x = 19,705.40 × 7,991.55
  4. Step 4: Simplify right side
    14,279.19x = 157,476,649.41
  5. Step 5: Solve for x
    x = 157,476,649.41/14,279.19
  6. Step 6: Final answer
    x = 11,028.40

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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.