Home / 20,666.46-28,519.40-11,713.80

Finding the Fourth Proportional to 20,666.46, 28,519.40 and 11,713.80

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Solution

The fourth proportional to 20,666.46, 28,519.40 and 11,713.80 is: 16,164.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.46 : 28,519.40 = 11,713.80 : x
  2. Step 2: Convert to fraction form
    20,666.46/28,519.40 = 11,713.80/x
  3. Step 3: Cross multiply
    20,666.46x = 28,519.40 × 11,713.80
  4. Step 4: Simplify right side
    20,666.46x = 334,070,547.72
  5. Step 5: Solve for x
    x = 334,070,547.72/20,666.46
  6. Step 6: Final answer
    x = 16,164.87

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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.