Home / 13,699.28-18,905-7,732.20

Finding the Fourth Proportional to 13,699.28, 18,905 and 7,732.20

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Solution

The fourth proportional to 13,699.28, 18,905 and 7,732.20 is: 10,670.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,699.28 : 18,905 = 7,732.20 : x
  2. Step 2: Convert to fraction form
    13,699.28/18,905 = 7,732.20/x
  3. Step 3: Cross multiply
    13,699.28x = 18,905 × 7,732.20
  4. Step 4: Simplify right side
    13,699.28x = 146,177,241
  5. Step 5: Solve for x
    x = 146,177,241/13,699.28
  6. Step 6: Final answer
    x = 10,670.43

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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.