Home / 7,872.18-10,853.52-6,450.63

Finding the Fourth Proportional to 7,872.18, 10,853.52 and 6,450.63

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Solution

The fourth proportional to 7,872.18, 10,853.52 and 6,450.63 is: 8,893.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,872.18 : 10,853.52 = 6,450.63 : x
  2. Step 2: Convert to fraction form
    7,872.18/10,853.52 = 6,450.63/x
  3. Step 3: Cross multiply
    7,872.18x = 10,853.52 × 6,450.63
  4. Step 4: Simplify right side
    7,872.18x = 70,012,041.72
  5. Step 5: Solve for x
    x = 70,012,041.72/7,872.18
  6. Step 6: Final answer
    x = 8,893.60

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Half scale
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Find fourth proportional to 7,873.18, 10,854.90 and 6,451.63
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.