Home / 21,066.60-31,408.20-18,700.01

Finding the Fourth Proportional to 21,066.60, 31,408.20 and 18,700.01

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Solution

The fourth proportional to 21,066.60, 31,408.20 and 18,700.01 is: 27,879.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,066.60 : 31,408.20 = 18,700.01 : x
  2. Step 2: Convert to fraction form
    21,066.60/31,408.20 = 18,700.01/x
  3. Step 3: Cross multiply
    21,066.60x = 31,408.20 × 18,700.01
  4. Step 4: Simplify right side
    21,066.60x = 587,333,497.04
  5. Step 5: Solve for x
    x = 587,333,497.04/21,066.60
  6. Step 6: Final answer
    x = 27,879.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.