Home / 12,455.78-18,679.80-4,133.93

Finding the Fourth Proportional to 12,455.78, 18,679.80 and 4,133.93

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Solution

The fourth proportional to 12,455.78, 18,679.80 and 4,133.93 is: 6,199.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.78 : 18,679.80 = 4,133.93 : x
  2. Step 2: Convert to fraction form
    12,455.78/18,679.80 = 4,133.93/x
  3. Step 3: Cross multiply
    12,455.78x = 18,679.80 × 4,133.93
  4. Step 4: Simplify right side
    12,455.78x = 77,220,985.61
  5. Step 5: Solve for x
    x = 77,220,985.61/12,455.78
  6. Step 6: Final answer
    x = 6,199.61

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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.