Home / 8,385.49-12,570.67-3,187.63

Finding the Fourth Proportional to 8,385.49, 12,570.67 and 3,187.63

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Solution

The fourth proportional to 8,385.49, 12,570.67 and 3,187.63 is: 4,778.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,385.49 : 12,570.67 = 3,187.63 : x
  2. Step 2: Convert to fraction form
    8,385.49/12,570.67 = 3,187.63/x
  3. Step 3: Cross multiply
    8,385.49x = 12,570.67 × 3,187.63
  4. Step 4: Simplify right side
    8,385.49x = 40,070,644.81
  5. Step 5: Solve for x
    x = 40,070,644.81/8,385.49
  6. Step 6: Final answer
    x = 4,778.57

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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.