Home / 7,718.13-10,643.40-6,221.25

Finding the Fourth Proportional to 7,718.13, 10,643.40 and 6,221.25

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Solution

The fourth proportional to 7,718.13, 10,643.40 and 6,221.25 is: 8,579.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,718.13 : 10,643.40 = 6,221.25 : x
  2. Step 2: Convert to fraction form
    7,718.13/10,643.40 = 6,221.25/x
  3. Step 3: Cross multiply
    7,718.13x = 10,643.40 × 6,221.25
  4. Step 4: Simplify right side
    7,718.13x = 66,215,252.25
  5. Step 5: Solve for x
    x = 66,215,252.25/7,718.13
  6. Step 6: Final answer
    x = 8,579.18

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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.