Home / 7,929.28-11,870.66-4,172.20

Finding the Fourth Proportional to 7,929.28, 11,870.66 and 4,172.20

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Solution

The fourth proportional to 7,929.28, 11,870.66 and 4,172.20 is: 6,246.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,929.28 : 11,870.66 = 4,172.20 : x
  2. Step 2: Convert to fraction form
    7,929.28/11,870.66 = 4,172.20/x
  3. Step 3: Cross multiply
    7,929.28x = 11,870.66 × 4,172.20
  4. Step 4: Simplify right side
    7,929.28x = 49,526,737.58
  5. Step 5: Solve for x
    x = 49,526,737.58/7,929.28
  6. Step 6: Final answer
    x = 6,246.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.