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Finding the Fourth Proportional to 15,595.41, 21,521.81 and 8,521.98

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Solution

The fourth proportional to 15,595.41, 21,521.81 and 8,521.98 is: 11,760.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,595.41 : 21,521.81 = 8,521.98 : x
  2. Step 2: Convert to fraction form
    15,595.41/21,521.81 = 8,521.98/x
  3. Step 3: Cross multiply
    15,595.41x = 21,521.81 × 8,521.98
  4. Step 4: Simplify right side
    15,595.41x = 183,408,455.69
  5. Step 5: Solve for x
    x = 183,408,455.69/15,595.41
  6. Step 6: Final answer
    x = 11,760.42

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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.