Home / 7,120.40-9,826.06-4,136.20

Finding the Fourth Proportional to 7,120.40, 9,826.06 and 4,136.20

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Solution

The fourth proportional to 7,120.40, 9,826.06 and 4,136.20 is: 5,707.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.40 : 9,826.06 = 4,136.20 : x
  2. Step 2: Convert to fraction form
    7,120.40/9,826.06 = 4,136.20/x
  3. Step 3: Cross multiply
    7,120.40x = 9,826.06 × 4,136.20
  4. Step 4: Simplify right side
    7,120.40x = 40,642,549.37
  5. Step 5: Solve for x
    x = 40,642,549.37/7,120.40
  6. Step 6: Final answer
    x = 5,707.90

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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.