Home / 9,121.65-12,587.85-4,929.90

Finding the Fourth Proportional to 9,121.65, 12,587.85 and 4,929.90

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Solution

The fourth proportional to 9,121.65, 12,587.85 and 4,929.90 is: 6,803.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.65 : 12,587.85 = 4,929.90 : x
  2. Step 2: Convert to fraction form
    9,121.65/12,587.85 = 4,929.90/x
  3. Step 3: Cross multiply
    9,121.65x = 12,587.85 × 4,929.90
  4. Step 4: Simplify right side
    9,121.65x = 62,056,841.72
  5. Step 5: Solve for x
    x = 62,056,841.72/9,121.65
  6. Step 6: Final answer
    x = 6,803.25

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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.