Home / 12,720.06-19,085.58-6,151.20

Finding the Fourth Proportional to 12,720.06, 19,085.58 and 6,151.20

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Solution

The fourth proportional to 12,720.06, 19,085.58 and 6,151.20 is: 9,229.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.06 : 19,085.58 = 6,151.20 : x
  2. Step 2: Convert to fraction form
    12,720.06/19,085.58 = 6,151.20/x
  3. Step 3: Cross multiply
    12,720.06x = 19,085.58 × 6,151.20
  4. Step 4: Simplify right side
    12,720.06x = 117,399,219.70
  5. Step 5: Solve for x
    x = 117,399,219.70/12,720.06
  6. Step 6: Final answer
    x = 9,229.45

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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.