Home / 9,218.16-12,718.38-5,239.20

Finding the Fourth Proportional to 9,218.16, 12,718.38 and 5,239.20

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Solution

The fourth proportional to 9,218.16, 12,718.38 and 5,239.20 is: 7,228.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,218.16 : 12,718.38 = 5,239.20 : x
  2. Step 2: Convert to fraction form
    9,218.16/12,718.38 = 5,239.20/x
  3. Step 3: Cross multiply
    9,218.16x = 12,718.38 × 5,239.20
  4. Step 4: Simplify right side
    9,218.16x = 66,634,136.50
  5. Step 5: Solve for x
    x = 66,634,136.50/9,218.16
  6. Step 6: Final answer
    x = 7,228.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.