Home / 12,762.20-19,148.70-8,085.80

Finding the Fourth Proportional to 12,762.20, 19,148.70 and 8,085.80

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Solution

The fourth proportional to 12,762.20, 19,148.70 and 8,085.80 is: 12,132.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,762.20 : 19,148.70 = 8,085.80 : x
  2. Step 2: Convert to fraction form
    12,762.20/19,148.70 = 8,085.80/x
  3. Step 3: Cross multiply
    12,762.20x = 19,148.70 × 8,085.80
  4. Step 4: Simplify right side
    12,762.20x = 154,832,558.46
  5. Step 5: Solve for x
    x = 154,832,558.46/12,762.20
  6. Step 6: Final answer
    x = 12,132.12

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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.