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Finding the Fourth Proportional to 15,858.33, 21,884.51 and 8,784.80

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Solution

The fourth proportional to 15,858.33, 21,884.51 and 8,784.80 is: 12,123.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,858.33 : 21,884.51 = 8,784.80 : x
  2. Step 2: Convert to fraction form
    15,858.33/21,884.51 = 8,784.80/x
  3. Step 3: Cross multiply
    15,858.33x = 21,884.51 × 8,784.80
  4. Step 4: Simplify right side
    15,858.33x = 192,251,038.05
  5. Step 5: Solve for x
    x = 192,251,038.05/15,858.33
  6. Step 6: Final answer
    x = 12,123.03

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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.