Home / 13,120.61-18,112.68-8,089.00

Finding the Fourth Proportional to 13,120.61, 18,112.68 and 8,089.00

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Solution

The fourth proportional to 13,120.61, 18,112.68 and 8,089.00 is: 11,166.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.61 : 18,112.68 = 8,089.00 : x
  2. Step 2: Convert to fraction form
    13,120.61/18,112.68 = 8,089.00/x
  3. Step 3: Cross multiply
    13,120.61x = 18,112.68 × 8,089.00
  4. Step 4: Simplify right side
    13,120.61x = 146,513,423.24
  5. Step 5: Solve for x
    x = 146,513,423.24/13,120.61
  6. Step 6: Final answer
    x = 11,166.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.