Home / 13,216.50-18,238.77-7,912.08

Finding the Fourth Proportional to 13,216.50, 18,238.77 and 7,912.08

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Solution

The fourth proportional to 13,216.50, 18,238.77 and 7,912.08 is: 10,918.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,216.50 : 18,238.77 = 7,912.08 : x
  2. Step 2: Convert to fraction form
    13,216.50/18,238.77 = 7,912.08/x
  3. Step 3: Cross multiply
    13,216.50x = 18,238.77 × 7,912.08
  4. Step 4: Simplify right side
    13,216.50x = 144,306,607.34
  5. Step 5: Solve for x
    x = 144,306,607.34/13,216.50
  6. Step 6: Final answer
    x = 10,918.67

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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.