Home / 5,489.70-7,574.47-3,130.57

Finding the Fourth Proportional to 5,489.70, 7,574.47 and 3,130.57

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Solution

The fourth proportional to 5,489.70, 7,574.47 and 3,130.57 is: 4,319.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,489.70 : 7,574.47 = 3,130.57 : x
  2. Step 2: Convert to fraction form
    5,489.70/7,574.47 = 3,130.57/x
  3. Step 3: Cross multiply
    5,489.70x = 7,574.47 × 3,130.57
  4. Step 4: Simplify right side
    5,489.70x = 23,712,408.55
  5. Step 5: Solve for x
    x = 23,712,408.55/5,489.70
  6. Step 6: Final answer
    x = 4,319.44

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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.