Home / 3,120.76-4,705.09-2,909.26

Finding the Fourth Proportional to 3,120.76, 4,705.09 and 2,909.26

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Solution

The fourth proportional to 3,120.76, 4,705.09 and 2,909.26 is: 4,386.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.76 : 4,705.09 = 2,909.26 : x
  2. Step 2: Convert to fraction form
    3,120.76/4,705.09 = 2,909.26/x
  3. Step 3: Cross multiply
    3,120.76x = 4,705.09 × 2,909.26
  4. Step 4: Simplify right side
    3,120.76x = 13,688,330.13
  5. Step 5: Solve for x
    x = 13,688,330.13/3,120.76
  6. Step 6: Final answer
    x = 4,386.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.