Home / 21,991.40-32,954.70-18,686.60

Finding the Fourth Proportional to 21,991.40, 32,954.70 and 18,686.60

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Solution

The fourth proportional to 21,991.40, 32,954.70 and 18,686.60 is: 28,002.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.40 : 32,954.70 = 18,686.60 : x
  2. Step 2: Convert to fraction form
    21,991.40/32,954.70 = 18,686.60/x
  3. Step 3: Cross multiply
    21,991.40x = 32,954.70 × 18,686.60
  4. Step 4: Simplify right side
    21,991.40x = 615,811,297.02
  5. Step 5: Solve for x
    x = 615,811,297.02/21,991.40
  6. Step 6: Final answer
    x = 28,002.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.