Home / 5,401.80-8,102.70-5,280.30

Finding the Fourth Proportional to 5,401.80, 8,102.70 and 5,280.30

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Solution

The fourth proportional to 5,401.80, 8,102.70 and 5,280.30 is: 7,920.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,401.80 : 8,102.70 = 5,280.30 : x
  2. Step 2: Convert to fraction form
    5,401.80/8,102.70 = 5,280.30/x
  3. Step 3: Cross multiply
    5,401.80x = 8,102.70 × 5,280.30
  4. Step 4: Simplify right side
    5,401.80x = 42,784,686.81
  5. Step 5: Solve for x
    x = 42,784,686.81/5,401.80
  6. Step 6: Final answer
    x = 7,920.45

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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.