Home / 5,415.47-8,123.52-1,520.18

Finding the Fourth Proportional to 5,415.47, 8,123.52 and 1,520.18

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Solution

The fourth proportional to 5,415.47, 8,123.52 and 1,520.18 is: 2,280.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.47 : 8,123.52 = 1,520.18 : x
  2. Step 2: Convert to fraction form
    5,415.47/8,123.52 = 1,520.18/x
  3. Step 3: Cross multiply
    5,415.47x = 8,123.52 × 1,520.18
  4. Step 4: Simplify right side
    5,415.47x = 12,349,172.02
  5. Step 5: Solve for x
    x = 12,349,172.02/5,415.47
  6. Step 6: Final answer
    x = 2,280.35

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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.