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Finding the Fourth Proportional to 15,235.42, 21,026.82 and 8,521.42

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Solution

The fourth proportional to 15,235.42, 21,026.82 and 8,521.42 is: 11,760.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,235.42 : 21,026.82 = 8,521.42 : x
  2. Step 2: Convert to fraction form
    15,235.42/21,026.82 = 8,521.42/x
  3. Step 3: Cross multiply
    15,235.42x = 21,026.82 × 8,521.42
  4. Step 4: Simplify right side
    15,235.42x = 179,178,364.48
  5. Step 5: Solve for x
    x = 179,178,364.48/15,235.42
  6. Step 6: Final answer
    x = 11,760.64

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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.