Home / 7,878.34-10,872.56-4,521.12

Finding the Fourth Proportional to 7,878.34, 10,872.56 and 4,521.12

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Solution

The fourth proportional to 7,878.34, 10,872.56 and 4,521.12 is: 6,239.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.34 : 10,872.56 = 4,521.12 : x
  2. Step 2: Convert to fraction form
    7,878.34/10,872.56 = 4,521.12/x
  3. Step 3: Cross multiply
    7,878.34x = 10,872.56 × 4,521.12
  4. Step 4: Simplify right side
    7,878.34x = 49,156,148.47
  5. Step 5: Solve for x
    x = 49,156,148.47/7,878.34
  6. Step 6: Final answer
    x = 6,239.40

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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.