Home / 20,666.40-28,514.93-11,711.85

Finding the Fourth Proportional to 20,666.40, 28,514.93 and 11,711.85

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Solution

The fourth proportional to 20,666.40, 28,514.93 and 11,711.85 is: 16,159.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.40 : 28,514.93 = 11,711.85 : x
  2. Step 2: Convert to fraction form
    20,666.40/28,514.93 = 11,711.85/x
  3. Step 3: Cross multiply
    20,666.40x = 28,514.93 × 11,711.85
  4. Step 4: Simplify right side
    20,666.40x = 333,962,582.92
  5. Step 5: Solve for x
    x = 333,962,582.92/20,666.40
  6. Step 6: Final answer
    x = 16,159.69

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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.