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Finding the Fourth Proportional to 15,021.70, 20,729.61 and 8,307.39

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Solution

The fourth proportional to 15,021.70, 20,729.61 and 8,307.39 is: 11,464.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,021.70 : 20,729.61 = 8,307.39 : x
  2. Step 2: Convert to fraction form
    15,021.70/20,729.61 = 8,307.39/x
  3. Step 3: Cross multiply
    15,021.70x = 20,729.61 × 8,307.39
  4. Step 4: Simplify right side
    15,021.70x = 172,208,845.97
  5. Step 5: Solve for x
    x = 172,208,845.97/15,021.70
  6. Step 6: Final answer
    x = 11,464.00

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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.