Home / 13,520.55-18,658.89-7,855.23

Finding the Fourth Proportional to 13,520.55, 18,658.89 and 7,855.23

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Solution

The fourth proportional to 13,520.55, 18,658.89 and 7,855.23 is: 10,840.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.55 : 18,658.89 = 7,855.23 : x
  2. Step 2: Convert to fraction form
    13,520.55/18,658.89 = 7,855.23/x
  3. Step 3: Cross multiply
    13,520.55x = 18,658.89 × 7,855.23
  4. Step 4: Simplify right side
    13,520.55x = 146,569,872.49
  5. Step 5: Solve for x
    x = 146,569,872.49/13,520.55
  6. Step 6: Final answer
    x = 10,840.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.