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Finding the Fourth Proportional to 18,682.91, 28,031.85 and 7,590.45

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Solution

The fourth proportional to 18,682.91, 28,031.85 and 7,590.45 is: 11,388.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,682.91 : 28,031.85 = 7,590.45 : x
  2. Step 2: Convert to fraction form
    18,682.91/28,031.85 = 7,590.45/x
  3. Step 3: Cross multiply
    18,682.91x = 28,031.85 × 7,590.45
  4. Step 4: Simplify right side
    18,682.91x = 212,774,355.83
  5. Step 5: Solve for x
    x = 212,774,355.83/18,682.91
  6. Step 6: Final answer
    x = 11,388.72

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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.