Home / 12,639.38-17,436.70-7,331.12

Finding the Fourth Proportional to 12,639.38, 17,436.70 and 7,331.12

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Solution

The fourth proportional to 12,639.38, 17,436.70 and 7,331.12 is: 10,113.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.38 : 17,436.70 = 7,331.12 : x
  2. Step 2: Convert to fraction form
    12,639.38/17,436.70 = 7,331.12/x
  3. Step 3: Cross multiply
    12,639.38x = 17,436.70 × 7,331.12
  4. Step 4: Simplify right side
    12,639.38x = 127,830,540.10
  5. Step 5: Solve for x
    x = 127,830,540.10/12,639.38
  6. Step 6: Final answer
    x = 10,113.67

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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.