Home / 9,521.32-13,129.78-7,339.78

Finding the Fourth Proportional to 9,521.32, 13,129.78 and 7,339.78

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Solution

The fourth proportional to 9,521.32, 13,129.78 and 7,339.78 is: 10,121.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,521.32 : 13,129.78 = 7,339.78 : x
  2. Step 2: Convert to fraction form
    9,521.32/13,129.78 = 7,339.78/x
  3. Step 3: Cross multiply
    9,521.32x = 13,129.78 × 7,339.78
  4. Step 4: Simplify right side
    9,521.32x = 96,369,696.65
  5. Step 5: Solve for x
    x = 96,369,696.65/9,521.32
  6. Step 6: Final answer
    x = 10,121.46

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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.