Home / 19,871.48-27,399.84-12,691.64

Finding the Fourth Proportional to 19,871.48, 27,399.84 and 12,691.64

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Solution

The fourth proportional to 19,871.48, 27,399.84 and 12,691.64 is: 17,499.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,871.48 : 27,399.84 = 12,691.64 : x
  2. Step 2: Convert to fraction form
    19,871.48/27,399.84 = 12,691.64/x
  3. Step 3: Cross multiply
    19,871.48x = 27,399.84 × 12,691.64
  4. Step 4: Simplify right side
    19,871.48x = 347,748,905.34
  5. Step 5: Solve for x
    x = 347,748,905.34/19,871.48
  6. Step 6: Final answer
    x = 17,499.90

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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.