Home / 8,421.98-12,635.71-4,039.79

Finding the Fourth Proportional to 8,421.98, 12,635.71 and 4,039.79

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Solution

The fourth proportional to 8,421.98, 12,635.71 and 4,039.79 is: 6,060.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.98 : 12,635.71 = 4,039.79 : x
  2. Step 2: Convert to fraction form
    8,421.98/12,635.71 = 4,039.79/x
  3. Step 3: Cross multiply
    8,421.98x = 12,635.71 × 4,039.79
  4. Step 4: Simplify right side
    8,421.98x = 51,045,541.62
  5. Step 5: Solve for x
    x = 51,045,541.62/8,421.98
  6. Step 6: Final answer
    x = 6,060.99

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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.