Home / 12,539.35-18,816.31-9,890.65

Finding the Fourth Proportional to 12,539.35, 18,816.31 and 9,890.65

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Solution

The fourth proportional to 12,539.35, 18,816.31 and 9,890.65 is: 14,841.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,539.35 : 18,816.31 = 9,890.65 : x
  2. Step 2: Convert to fraction form
    12,539.35/18,816.31 = 9,890.65/x
  3. Step 3: Cross multiply
    12,539.35x = 18,816.31 × 9,890.65
  4. Step 4: Simplify right side
    12,539.35x = 186,105,536.50
  5. Step 5: Solve for x
    x = 186,105,536.50/12,539.35
  6. Step 6: Final answer
    x = 14,841.72

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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.