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Finding the Fourth Proportional to 18,974.40, 28,461.60 and 16,860.30

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Solution

The fourth proportional to 18,974.40, 28,461.60 and 16,860.30 is: 25,290.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,974.40 : 28,461.60 = 16,860.30 : x
  2. Step 2: Convert to fraction form
    18,974.40/28,461.60 = 16,860.30/x
  3. Step 3: Cross multiply
    18,974.40x = 28,461.60 × 16,860.30
  4. Step 4: Simplify right side
    18,974.40x = 479,871,114.48
  5. Step 5: Solve for x
    x = 479,871,114.48/18,974.40
  6. Step 6: Final answer
    x = 25,290.45

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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.