Home / 51,272.68-76,919.28-21,690.40

Finding the Fourth Proportional to 51,272.68, 76,919.28 and 21,690.40

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Solution

The fourth proportional to 51,272.68, 76,919.28 and 21,690.40 is: 32,539.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,272.68 : 76,919.28 = 21,690.40 : x
  2. Step 2: Convert to fraction form
    51,272.68/76,919.28 = 21,690.40/x
  3. Step 3: Cross multiply
    51,272.68x = 76,919.28 × 21,690.40
  4. Step 4: Simplify right side
    51,272.68x = 1,668,409,950.91
  5. Step 5: Solve for x
    x = 1,668,409,950.91/51,272.68
  6. Step 6: Final answer
    x = 32,539.94

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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.