Home / 15,881.76-21,915.25-9,169.55

Finding the Fourth Proportional to 15,881.76, 21,915.25 and 9,169.55

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Solution

The fourth proportional to 15,881.76, 21,915.25 and 9,169.55 is: 12,653.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,881.76 : 21,915.25 = 9,169.55 : x
  2. Step 2: Convert to fraction form
    15,881.76/21,915.25 = 9,169.55/x
  3. Step 3: Cross multiply
    15,881.76x = 21,915.25 × 9,169.55
  4. Step 4: Simplify right side
    15,881.76x = 200,952,980.64
  5. Step 5: Solve for x
    x = 200,952,980.64/15,881.76
  6. Step 6: Final answer
    x = 12,653.07

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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.