Home / 20,666.91-28,519.74-11,715.24

Finding the Fourth Proportional to 20,666.91, 28,519.74 and 11,715.24

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Solution

The fourth proportional to 20,666.91, 28,519.74 and 11,715.24 is: 16,166.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.91 : 28,519.74 = 11,715.24 : x
  2. Step 2: Convert to fraction form
    20,666.91/28,519.74 = 11,715.24/x
  3. Step 3: Cross multiply
    20,666.91x = 28,519.74 × 11,715.24
  4. Step 4: Simplify right side
    20,666.91x = 334,115,598.84
  5. Step 5: Solve for x
    x = 334,115,598.84/20,666.91
  6. Step 6: Final answer
    x = 16,166.69

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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.