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Finding the Fourth Proportional to 13,606.76, 18,776.31 and 7,639.34

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Solution

The fourth proportional to 13,606.76, 18,776.31 and 7,639.34 is: 10,541.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,606.76 : 18,776.31 = 7,639.34 : x
  2. Step 2: Convert to fraction form
    13,606.76/18,776.31 = 7,639.34/x
  3. Step 3: Cross multiply
    13,606.76x = 18,776.31 × 7,639.34
  4. Step 4: Simplify right side
    13,606.76x = 143,438,616.04
  5. Step 5: Solve for x
    x = 143,438,616.04/13,606.76
  6. Step 6: Final answer
    x = 10,541.72

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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.