Home / 13,605.28-18,772.80-7,636.12

Finding the Fourth Proportional to 13,605.28, 18,772.80 and 7,636.12

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Solution

The fourth proportional to 13,605.28, 18,772.80 and 7,636.12 is: 10,536.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.28 : 18,772.80 = 7,636.12 : x
  2. Step 2: Convert to fraction form
    13,605.28/18,772.80 = 7,636.12/x
  3. Step 3: Cross multiply
    13,605.28x = 18,772.80 × 7,636.12
  4. Step 4: Simplify right side
    13,605.28x = 143,351,353.54
  5. Step 5: Solve for x
    x = 143,351,353.54/13,605.28
  6. Step 6: Final answer
    x = 10,536.45

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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.