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Finding the Fourth Proportional to 19,223.40, 28,835.10 and 12,662.40

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Solution

The fourth proportional to 19,223.40, 28,835.10 and 12,662.40 is: 18,993.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,223.40 : 28,835.10 = 12,662.40 : x
  2. Step 2: Convert to fraction form
    19,223.40/28,835.10 = 12,662.40/x
  3. Step 3: Cross multiply
    19,223.40x = 28,835.10 × 12,662.40
  4. Step 4: Simplify right side
    19,223.40x = 365,121,570.24
  5. Step 5: Solve for x
    x = 365,121,570.24/19,223.40
  6. Step 6: Final answer
    x = 18,993.60

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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.