Home / 12,813.90-17,682.84-7,148.82

Finding the Fourth Proportional to 12,813.90, 17,682.84 and 7,148.82

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Solution

The fourth proportional to 12,813.90, 17,682.84 and 7,148.82 is: 9,865.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,813.90 : 17,682.84 = 7,148.82 : x
  2. Step 2: Convert to fraction form
    12,813.90/17,682.84 = 7,148.82/x
  3. Step 3: Cross multiply
    12,813.90x = 17,682.84 × 7,148.82
  4. Step 4: Simplify right side
    12,813.90x = 126,411,440.25
  5. Step 5: Solve for x
    x = 126,411,440.25/12,813.90
  6. Step 6: Final answer
    x = 9,865.18

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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.