Home / 8,420.94-12,631.50-3,156.03

Finding the Fourth Proportional to 8,420.94, 12,631.50 and 3,156.03

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Solution

The fourth proportional to 8,420.94, 12,631.50 and 3,156.03 is: 4,734.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.94 : 12,631.50 = 3,156.03 : x
  2. Step 2: Convert to fraction form
    8,420.94/12,631.50 = 3,156.03/x
  3. Step 3: Cross multiply
    8,420.94x = 12,631.50 × 3,156.03
  4. Step 4: Simplify right side
    8,420.94x = 39,865,392.95
  5. Step 5: Solve for x
    x = 39,865,392.95/8,420.94
  6. Step 6: Final answer
    x = 4,734.08

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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.