Home / 15,218.15-21,001.00-8,503.78

Finding the Fourth Proportional to 15,218.15, 21,001.00 and 8,503.78

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Solution

The fourth proportional to 15,218.15, 21,001.00 and 8,503.78 is: 11,735.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,218.15 : 21,001.00 = 8,503.78 : x
  2. Step 2: Convert to fraction form
    15,218.15/21,001.00 = 8,503.78/x
  3. Step 3: Cross multiply
    15,218.15x = 21,001.00 × 8,503.78
  4. Step 4: Simplify right side
    15,218.15x = 178,587,915.02
  5. Step 5: Solve for x
    x = 178,587,915.02/15,218.15
  6. Step 6: Final answer
    x = 11,735.19

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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.