Home / 13,218.96-18,240.87-7,913.67

Finding the Fourth Proportional to 13,218.96, 18,240.87 and 7,913.67

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Solution

The fourth proportional to 13,218.96, 18,240.87 and 7,913.67 is: 10,920.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.96 : 18,240.87 = 7,913.67 : x
  2. Step 2: Convert to fraction form
    13,218.96/18,240.87 = 7,913.67/x
  3. Step 3: Cross multiply
    13,218.96x = 18,240.87 × 7,913.67
  4. Step 4: Simplify right side
    13,218.96x = 144,352,225.69
  5. Step 5: Solve for x
    x = 144,352,225.69/13,218.96
  6. Step 6: Final answer
    x = 10,920.09

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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.