Home / 20,950.51-28,911.68-12,000.91

Finding the Fourth Proportional to 20,950.51, 28,911.68 and 12,000.91

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Solution

The fourth proportional to 20,950.51, 28,911.68 and 12,000.91 is: 16,561.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.51 : 28,911.68 = 12,000.91 : x
  2. Step 2: Convert to fraction form
    20,950.51/28,911.68 = 12,000.91/x
  3. Step 3: Cross multiply
    20,950.51x = 28,911.68 × 12,000.91
  4. Step 4: Simplify right side
    20,950.51x = 346,966,409.62
  5. Step 5: Solve for x
    x = 346,966,409.62/20,950.51
  6. Step 6: Final answer
    x = 16,561.24

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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.