Home / 15,680.72-21,638.04-8,964.20

Finding the Fourth Proportional to 15,680.72, 21,638.04 and 8,964.20

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Solution

The fourth proportional to 15,680.72, 21,638.04 and 8,964.20 is: 12,369.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,680.72 : 21,638.04 = 8,964.20 : x
  2. Step 2: Convert to fraction form
    15,680.72/21,638.04 = 8,964.20/x
  3. Step 3: Cross multiply
    15,680.72x = 21,638.04 × 8,964.20
  4. Step 4: Simplify right side
    15,680.72x = 193,967,718.17
  5. Step 5: Solve for x
    x = 193,967,718.17/15,680.72
  6. Step 6: Final answer
    x = 12,369.82

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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.