Home / 13,458.61-20,174.80-6,436.79

Finding the Fourth Proportional to 13,458.61, 20,174.80 and 6,436.79

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Solution

The fourth proportional to 13,458.61, 20,174.80 and 6,436.79 is: 9,648.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.61 : 20,174.80 = 6,436.79 : x
  2. Step 2: Convert to fraction form
    13,458.61/20,174.80 = 6,436.79/x
  3. Step 3: Cross multiply
    13,458.61x = 20,174.80 × 6,436.79
  4. Step 4: Simplify right side
    13,458.61x = 129,860,950.89
  5. Step 5: Solve for x
    x = 129,860,950.89/13,458.61
  6. Step 6: Final answer
    x = 9,648.91

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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.