Home / 13,695.25-18,900.31-7,724.74

Finding the Fourth Proportional to 13,695.25, 18,900.31 and 7,724.74

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Solution

The fourth proportional to 13,695.25, 18,900.31 and 7,724.74 is: 10,660.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.25 : 18,900.31 = 7,724.74 : x
  2. Step 2: Convert to fraction form
    13,695.25/18,900.31 = 7,724.74/x
  3. Step 3: Cross multiply
    13,695.25x = 18,900.31 × 7,724.74
  4. Step 4: Simplify right side
    13,695.25x = 145,999,980.67
  5. Step 5: Solve for x
    x = 145,999,980.67/13,695.25
  6. Step 6: Final answer
    x = 10,660.63

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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.