Home / 5,415.49-8,123.55-1,520.20

Finding the Fourth Proportional to 5,415.49, 8,123.55 and 1,520.20

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Solution

The fourth proportional to 5,415.49, 8,123.55 and 1,520.20 is: 2,280.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.49 : 8,123.55 = 1,520.20 : x
  2. Step 2: Convert to fraction form
    5,415.49/8,123.55 = 1,520.20/x
  3. Step 3: Cross multiply
    5,415.49x = 8,123.55 × 1,520.20
  4. Step 4: Simplify right side
    5,415.49x = 12,349,420.71
  5. Step 5: Solve for x
    x = 12,349,420.71/5,415.49
  6. Step 6: Final answer
    x = 2,280.39

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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.