Home / 7,721.92-10,656.24-4,578.40

Finding the Fourth Proportional to 7,721.92, 10,656.24 and 4,578.40

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Solution

The fourth proportional to 7,721.92, 10,656.24 and 4,578.40 is: 6,318.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.92 : 10,656.24 = 4,578.40 : x
  2. Step 2: Convert to fraction form
    7,721.92/10,656.24 = 4,578.40/x
  3. Step 3: Cross multiply
    7,721.92x = 10,656.24 × 4,578.40
  4. Step 4: Simplify right side
    7,721.92x = 48,788,529.22
  5. Step 5: Solve for x
    x = 48,788,529.22/7,721.92
  6. Step 6: Final answer
    x = 6,318.19

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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.