Home / 13,140.82-19,688.94-7,935.76

Finding the Fourth Proportional to 13,140.82, 19,688.94 and 7,935.76

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Solution

The fourth proportional to 13,140.82, 19,688.94 and 7,935.76 is: 11,890.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.82 : 19,688.94 = 7,935.76 : x
  2. Step 2: Convert to fraction form
    13,140.82/19,688.94 = 7,935.76/x
  3. Step 3: Cross multiply
    13,140.82x = 19,688.94 × 7,935.76
  4. Step 4: Simplify right side
    13,140.82x = 156,246,702.49
  5. Step 5: Solve for x
    x = 156,246,702.49/13,140.82
  6. Step 6: Final answer
    x = 11,890.18

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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.