Home / 9,120.90-12,586.82-4,929.15

Finding the Fourth Proportional to 9,120.90, 12,586.82 and 4,929.15

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Solution

The fourth proportional to 9,120.90, 12,586.82 and 4,929.15 is: 6,802.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.90 : 12,586.82 = 4,929.15 : x
  2. Step 2: Convert to fraction form
    9,120.90/12,586.82 = 4,929.15/x
  3. Step 3: Cross multiply
    9,120.90x = 12,586.82 × 4,929.15
  4. Step 4: Simplify right side
    9,120.90x = 62,042,299.16
  5. Step 5: Solve for x
    x = 62,042,299.16/9,120.90
  6. Step 6: Final answer
    x = 6,802.21

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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.