Home / 11,981.08-18,012.18-9,657.40

Finding the Fourth Proportional to 11,981.08, 18,012.18 and 9,657.40

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Solution

The fourth proportional to 11,981.08, 18,012.18 and 9,657.40 is: 14,518.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,981.08 : 18,012.18 = 9,657.40 : x
  2. Step 2: Convert to fraction form
    11,981.08/18,012.18 = 9,657.40/x
  3. Step 3: Cross multiply
    11,981.08x = 18,012.18 × 9,657.40
  4. Step 4: Simplify right side
    11,981.08x = 173,950,827.13
  5. Step 5: Solve for x
    x = 173,950,827.13/11,981.08
  6. Step 6: Final answer
    x = 14,518.79

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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.