Home / 14,278.56-19,705.32-7,991.40

Finding the Fourth Proportional to 14,278.56, 19,705.32 and 7,991.40

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Solution

The fourth proportional to 14,278.56, 19,705.32 and 7,991.40 is: 11,028.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,278.56 : 19,705.32 = 7,991.40 : x
  2. Step 2: Convert to fraction form
    14,278.56/19,705.32 = 7,991.40/x
  3. Step 3: Cross multiply
    14,278.56x = 19,705.32 × 7,991.40
  4. Step 4: Simplify right side
    14,278.56x = 157,473,094.25
  5. Step 5: Solve for x
    x = 157,473,094.25/14,278.56
  6. Step 6: Final answer
    x = 11,028.64

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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.