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Finding the Fourth Proportional to 13,171.80, 19,739.70 and 8,477.40

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Solution

The fourth proportional to 13,171.80, 19,739.70 and 8,477.40 is: 12,704.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,171.80 : 19,739.70 = 8,477.40 : x
  2. Step 2: Convert to fraction form
    13,171.80/19,739.70 = 8,477.40/x
  3. Step 3: Cross multiply
    13,171.80x = 19,739.70 × 8,477.40
  4. Step 4: Simplify right side
    13,171.80x = 167,341,332.78
  5. Step 5: Solve for x
    x = 167,341,332.78/13,171.80
  6. Step 6: Final answer
    x = 12,704.52

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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.