Home / 5,130.16-7,695.20-1,620.46

Finding the Fourth Proportional to 5,130.16, 7,695.20 and 1,620.46

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Solution

The fourth proportional to 5,130.16, 7,695.20 and 1,620.46 is: 2,430.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130.16 : 7,695.20 = 1,620.46 : x
  2. Step 2: Convert to fraction form
    5,130.16/7,695.20 = 1,620.46/x
  3. Step 3: Cross multiply
    5,130.16x = 7,695.20 × 1,620.46
  4. Step 4: Simplify right side
    5,130.16x = 12,469,763.79
  5. Step 5: Solve for x
    x = 12,469,763.79/5,130.16
  6. Step 6: Final answer
    x = 2,430.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.