Home / 12,840.18-19,262.40-4,077.20

Finding the Fourth Proportional to 12,840.18, 19,262.40 and 4,077.20

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Solution

The fourth proportional to 12,840.18, 19,262.40 and 4,077.20 is: 6,116.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.18 : 19,262.40 = 4,077.20 : x
  2. Step 2: Convert to fraction form
    12,840.18/19,262.40 = 4,077.20/x
  3. Step 3: Cross multiply
    12,840.18x = 19,262.40 × 4,077.20
  4. Step 4: Simplify right side
    12,840.18x = 78,536,560.97
  5. Step 5: Solve for x
    x = 78,536,560.97/12,840.18
  6. Step 6: Final answer
    x = 6,116.47

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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.