Home / 15,915.69-21,964.10-8,842.55

Finding the Fourth Proportional to 15,915.69, 21,964.10 and 8,842.55

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Solution

The fourth proportional to 15,915.69, 21,964.10 and 8,842.55 is: 12,202.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,915.69 : 21,964.10 = 8,842.55 : x
  2. Step 2: Convert to fraction form
    15,915.69/21,964.10 = 8,842.55/x
  3. Step 3: Cross multiply
    15,915.69x = 21,964.10 × 8,842.55
  4. Step 4: Simplify right side
    15,915.69x = 194,218,498.42
  5. Step 5: Solve for x
    x = 194,218,498.42/15,915.69
  6. Step 6: Final answer
    x = 12,202.96

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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.