Home / 15,881.09-21,915.86-8,711.03

Finding the Fourth Proportional to 15,881.09, 21,915.86 and 8,711.03

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Solution

The fourth proportional to 15,881.09, 21,915.86 and 8,711.03 is: 12,021.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,881.09 : 21,915.86 = 8,711.03 : x
  2. Step 2: Convert to fraction form
    15,881.09/21,915.86 = 8,711.03/x
  3. Step 3: Cross multiply
    15,881.09x = 21,915.86 × 8,711.03
  4. Step 4: Simplify right side
    15,881.09x = 190,909,725.17
  5. Step 5: Solve for x
    x = 190,909,725.17/15,881.09
  6. Step 6: Final answer
    x = 12,021.20

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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.