Home / 12,415.86-18,636.03-9,119.70

Finding the Fourth Proportional to 12,415.86, 18,636.03 and 9,119.70

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Solution

The fourth proportional to 12,415.86, 18,636.03 and 9,119.70 is: 13,688.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,415.86 : 18,636.03 = 9,119.70 : x
  2. Step 2: Convert to fraction form
    12,415.86/18,636.03 = 9,119.70/x
  3. Step 3: Cross multiply
    12,415.86x = 18,636.03 × 9,119.70
  4. Step 4: Simplify right side
    12,415.86x = 169,955,002.79
  5. Step 5: Solve for x
    x = 169,955,002.79/12,415.86
  6. Step 6: Final answer
    x = 13,688.54

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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.