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Finding the Fourth Proportional to 13,959.14, 19,264.89 and 7,992.74

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Solution

The fourth proportional to 13,959.14, 19,264.89 and 7,992.74 is: 11,030.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.14 : 19,264.89 = 7,992.74 : x
  2. Step 2: Convert to fraction form
    13,959.14/19,264.89 = 7,992.74/x
  3. Step 3: Cross multiply
    13,959.14x = 19,264.89 × 7,992.74
  4. Step 4: Simplify right side
    13,959.14x = 153,979,256.90
  5. Step 5: Solve for x
    x = 153,979,256.90/13,959.14
  6. Step 6: Final answer
    x = 11,030.71

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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.