Home / 12,261.78-16,920.09-7,545.15

Finding the Fourth Proportional to 12,261.78, 16,920.09 and 7,545.15

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Solution

The fourth proportional to 12,261.78, 16,920.09 and 7,545.15 is: 10,411.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,261.78 : 16,920.09 = 7,545.15 : x
  2. Step 2: Convert to fraction form
    12,261.78/16,920.09 = 7,545.15/x
  3. Step 3: Cross multiply
    12,261.78x = 16,920.09 × 7,545.15
  4. Step 4: Simplify right side
    12,261.78x = 127,664,617.06
  5. Step 5: Solve for x
    x = 127,664,617.06/12,261.78
  6. Step 6: Final answer
    x = 10,411.59

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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.