Home / 7,721.35-10,656.12-6,460.18

Finding the Fourth Proportional to 7,721.35, 10,656.12 and 6,460.18

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Solution

The fourth proportional to 7,721.35, 10,656.12 and 6,460.18 is: 8,915.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.35 : 10,656.12 = 6,460.18 : x
  2. Step 2: Convert to fraction form
    7,721.35/10,656.12 = 6,460.18/x
  3. Step 3: Cross multiply
    7,721.35x = 10,656.12 × 6,460.18
  4. Step 4: Simplify right side
    7,721.35x = 68,840,453.30
  5. Step 5: Solve for x
    x = 68,840,453.30/7,721.35
  6. Step 6: Final answer
    x = 8,915.60

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Half scale
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Double scale
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Similar ratio
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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.