Home / 12,890.16-17,787.12-7,511.76

Finding the Fourth Proportional to 12,890.16, 17,787.12 and 7,511.76

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Solution

The fourth proportional to 12,890.16, 17,787.12 and 7,511.76 is: 10,365.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.16 : 17,787.12 = 7,511.76 : x
  2. Step 2: Convert to fraction form
    12,890.16/17,787.12 = 7,511.76/x
  3. Step 3: Cross multiply
    12,890.16x = 17,787.12 × 7,511.76
  4. Step 4: Simplify right side
    12,890.16x = 133,612,576.53
  5. Step 5: Solve for x
    x = 133,612,576.53/12,890.16
  6. Step 6: Final answer
    x = 10,365.47

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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.