Home / 13,278.02-19,920-3,917.93

Finding the Fourth Proportional to 13,278.02, 19,920 and 3,917.93

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Solution

The fourth proportional to 13,278.02, 19,920 and 3,917.93 is: 5,877.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.02 : 19,920 = 3,917.93 : x
  2. Step 2: Convert to fraction form
    13,278.02/19,920 = 3,917.93/x
  3. Step 3: Cross multiply
    13,278.02x = 19,920 × 3,917.93
  4. Step 4: Simplify right side
    13,278.02x = 78,045,165.60
  5. Step 5: Solve for x
    x = 78,045,165.60/13,278.02
  6. Step 6: Final answer
    x = 5,877.77

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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.