Home / 18,021.12-24,880.80-16,129.40

Finding the Fourth Proportional to 18,021.12, 24,880.80 and 16,129.40

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Solution

The fourth proportional to 18,021.12, 24,880.80 and 16,129.40 is: 22,269.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,021.12 : 24,880.80 = 16,129.40 : x
  2. Step 2: Convert to fraction form
    18,021.12/24,880.80 = 16,129.40/x
  3. Step 3: Cross multiply
    18,021.12x = 24,880.80 × 16,129.40
  4. Step 4: Simplify right side
    18,021.12x = 401,312,311.60
  5. Step 5: Solve for x
    x = 401,312,311.60/18,021.12
  6. Step 6: Final answer
    x = 22,269.00

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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.