Home / 12,580.40-18,872.87-5,180.82

Finding the Fourth Proportional to 12,580.40, 18,872.87 and 5,180.82

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Solution

The fourth proportional to 12,580.40, 18,872.87 and 5,180.82 is: 7,772.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,580.40 : 18,872.87 = 5,180.82 : x
  2. Step 2: Convert to fraction form
    12,580.40/18,872.87 = 5,180.82/x
  3. Step 3: Cross multiply
    12,580.40x = 18,872.87 × 5,180.82
  4. Step 4: Simplify right side
    12,580.40x = 97,776,916.45
  5. Step 5: Solve for x
    x = 97,776,916.45/12,580.40
  6. Step 6: Final answer
    x = 7,772.17

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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.