Home / 7,721.16-10,655.20-4,184.40

Finding the Fourth Proportional to 7,721.16, 10,655.20 and 4,184.40

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Solution

The fourth proportional to 7,721.16, 10,655.20 and 4,184.40 is: 5,774.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.16 : 10,655.20 = 4,184.40 : x
  2. Step 2: Convert to fraction form
    7,721.16/10,655.20 = 4,184.40/x
  3. Step 3: Cross multiply
    7,721.16x = 10,655.20 × 4,184.40
  4. Step 4: Simplify right side
    7,721.16x = 44,585,618.88
  5. Step 5: Solve for x
    x = 44,585,618.88/7,721.16
  6. Step 6: Final answer
    x = 5,774.47

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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.