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Finding the Fourth Proportional to 5,430.03, 8,145.03 and 1,920.15

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Solution

The fourth proportional to 5,430.03, 8,145.03 and 1,920.15 is: 2,880.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.03 : 8,145.03 = 1,920.15 : x
  2. Step 2: Convert to fraction form
    5,430.03/8,145.03 = 1,920.15/x
  3. Step 3: Cross multiply
    5,430.03x = 8,145.03 × 1,920.15
  4. Step 4: Simplify right side
    5,430.03x = 15,639,679.35
  5. Step 5: Solve for x
    x = 15,639,679.35/5,430.03
  6. Step 6: Final answer
    x = 2,880.22

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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.