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Finding the Fourth Proportional to 13,235.72, 18,264.74 and 7,930.28

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Solution

The fourth proportional to 13,235.72, 18,264.74 and 7,930.28 is: 10,943.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,235.72 : 18,264.74 = 7,930.28 : x
  2. Step 2: Convert to fraction form
    13,235.72/18,264.74 = 7,930.28/x
  3. Step 3: Cross multiply
    13,235.72x = 18,264.74 × 7,930.28
  4. Step 4: Simplify right side
    13,235.72x = 144,844,502.33
  5. Step 5: Solve for x
    x = 144,844,502.33/13,235.72
  6. Step 6: Final answer
    x = 10,943.45

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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.