Home / 5,409.24-7,499.13-5,128.20

Finding the Fourth Proportional to 5,409.24, 7,499.13 and 5,128.20

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Solution

The fourth proportional to 5,409.24, 7,499.13 and 5,128.20 is: 7,109.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,409.24 : 7,499.13 = 5,128.20 : x
  2. Step 2: Convert to fraction form
    5,409.24/7,499.13 = 5,128.20/x
  3. Step 3: Cross multiply
    5,409.24x = 7,499.13 × 5,128.20
  4. Step 4: Simplify right side
    5,409.24x = 38,457,038.47
  5. Step 5: Solve for x
    x = 38,457,038.47/5,409.24
  6. Step 6: Final answer
    x = 7,109.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.