Home / 12,938.60-19,415.10-5,541.80

Finding the Fourth Proportional to 12,938.60, 19,415.10 and 5,541.80

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Solution

The fourth proportional to 12,938.60, 19,415.10 and 5,541.80 is: 8,315.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.60 : 19,415.10 = 5,541.80 : x
  2. Step 2: Convert to fraction form
    12,938.60/19,415.10 = 5,541.80/x
  3. Step 3: Cross multiply
    12,938.60x = 19,415.10 × 5,541.80
  4. Step 4: Simplify right side
    12,938.60x = 107,594,601.18
  5. Step 5: Solve for x
    x = 107,594,601.18/12,938.60
  6. Step 6: Final answer
    x = 8,315.78

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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.