Home / 8,427.89-12,642.30-2,880.47

Finding the Fourth Proportional to 8,427.89, 12,642.30 and 2,880.47

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Solution

The fourth proportional to 8,427.89, 12,642.30 and 2,880.47 is: 4,320.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,427.89 : 12,642.30 = 2,880.47 : x
  2. Step 2: Convert to fraction form
    8,427.89/12,642.30 = 2,880.47/x
  3. Step 3: Cross multiply
    8,427.89x = 12,642.30 × 2,880.47
  4. Step 4: Simplify right side
    8,427.89x = 36,415,702.67
  5. Step 5: Solve for x
    x = 36,415,702.67/8,427.89
  6. Step 6: Final answer
    x = 4,320.86

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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.