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Finding the Fourth Proportional to 19,309.86, 28,958.67 and 9,946.98

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Solution

The fourth proportional to 19,309.86, 28,958.67 and 9,946.98 is: 14,917.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,309.86 : 28,958.67 = 9,946.98 : x
  2. Step 2: Convert to fraction form
    19,309.86/28,958.67 = 9,946.98/x
  3. Step 3: Cross multiply
    19,309.86x = 28,958.67 × 9,946.98
  4. Step 4: Simplify right side
    19,309.86x = 288,051,311.32
  5. Step 5: Solve for x
    x = 288,051,311.32/19,309.86
  6. Step 6: Final answer
    x = 14,917.32

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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.