Home / 12,639.29-18,969.26-8,945.10

Finding the Fourth Proportional to 12,639.29, 18,969.26 and 8,945.10

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Solution

The fourth proportional to 12,639.29, 18,969.26 and 8,945.10 is: 13,424.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.29 : 18,969.26 = 8,945.10 : x
  2. Step 2: Convert to fraction form
    12,639.29/18,969.26 = 8,945.10/x
  3. Step 3: Cross multiply
    12,639.29x = 18,969.26 × 8,945.10
  4. Step 4: Simplify right side
    12,639.29x = 169,681,882.90
  5. Step 5: Solve for x
    x = 169,681,882.90/12,639.29
  6. Step 6: Final answer
    x = 13,424.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.