Home / 9,121.31-12,587.42-4,929.56

Finding the Fourth Proportional to 9,121.31, 12,587.42 and 4,929.56

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Solution

The fourth proportional to 9,121.31, 12,587.42 and 4,929.56 is: 6,802.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.31 : 12,587.42 = 4,929.56 : x
  2. Step 2: Convert to fraction form
    9,121.31/12,587.42 = 4,929.56/x
  3. Step 3: Cross multiply
    9,121.31x = 12,587.42 × 4,929.56
  4. Step 4: Simplify right side
    9,121.31x = 62,050,485.93
  5. Step 5: Solve for x
    x = 62,050,485.93/9,121.31
  6. Step 6: Final answer
    x = 6,802.80

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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.