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Finding the Fourth Proportional to 12,559.60, 18,810.60 and 12,271.60

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Solution

The fourth proportional to 12,559.60, 18,810.60 and 12,271.60 is: 18,379.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,559.60 : 18,810.60 = 12,271.60 : x
  2. Step 2: Convert to fraction form
    12,559.60/18,810.60 = 12,271.60/x
  3. Step 3: Cross multiply
    12,559.60x = 18,810.60 × 12,271.60
  4. Step 4: Simplify right side
    12,559.60x = 230,836,158.96
  5. Step 5: Solve for x
    x = 230,836,158.96/12,559.60
  6. Step 6: Final answer
    x = 18,379.26

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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.