Home / 5,430.80-8,147.10-2,312.30

Finding the Fourth Proportional to 5,430.80, 8,147.10 and 2,312.30

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Solution

The fourth proportional to 5,430.80, 8,147.10 and 2,312.30 is: 3,468.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.80 : 8,147.10 = 2,312.30 : x
  2. Step 2: Convert to fraction form
    5,430.80/8,147.10 = 2,312.30/x
  3. Step 3: Cross multiply
    5,430.80x = 8,147.10 × 2,312.30
  4. Step 4: Simplify right side
    5,430.80x = 18,838,539.33
  5. Step 5: Solve for x
    x = 18,838,539.33/5,430.80
  6. Step 6: Final answer
    x = 3,468.83

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1.5x scale

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.