Home / 20,666.63-28,519.40-11,714.51

Finding the Fourth Proportional to 20,666.63, 28,519.40 and 11,714.51

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Solution

The fourth proportional to 20,666.63, 28,519.40 and 11,714.51 is: 16,165.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.63 : 28,519.40 = 11,714.51 : x
  2. Step 2: Convert to fraction form
    20,666.63/28,519.40 = 11,714.51/x
  3. Step 3: Cross multiply
    20,666.63x = 28,519.40 × 11,714.51
  4. Step 4: Simplify right side
    20,666.63x = 334,090,796.49
  5. Step 5: Solve for x
    x = 334,090,796.49/20,666.63
  6. Step 6: Final answer
    x = 16,165.71

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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.