Home / 13,695.26-18,899.46-7,728.18

Finding the Fourth Proportional to 13,695.26, 18,899.46 and 7,728.18

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Solution

The fourth proportional to 13,695.26, 18,899.46 and 7,728.18 is: 10,664.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.26 : 18,899.46 = 7,728.18 : x
  2. Step 2: Convert to fraction form
    13,695.26/18,899.46 = 7,728.18/x
  3. Step 3: Cross multiply
    13,695.26x = 18,899.46 × 7,728.18
  4. Step 4: Simplify right side
    13,695.26x = 146,058,428.78
  5. Step 5: Solve for x
    x = 146,058,428.78/13,695.26
  6. Step 6: Final answer
    x = 10,664.89

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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.