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Finding the Fourth Proportional to 15,928.81, 23,893.82 and 8,128.51

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Solution

The fourth proportional to 15,928.81, 23,893.82 and 8,128.51 is: 12,193.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.81 : 23,893.82 = 8,128.51 : x
  2. Step 2: Convert to fraction form
    15,928.81/23,893.82 = 8,128.51/x
  3. Step 3: Cross multiply
    15,928.81x = 23,893.82 × 8,128.51
  4. Step 4: Simplify right side
    15,928.81x = 194,221,220.24
  5. Step 5: Solve for x
    x = 194,221,220.24/15,928.81
  6. Step 6: Final answer
    x = 12,193.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.