Home / 13,220.72-18,244-7,918.46

Finding the Fourth Proportional to 13,220.72, 18,244 and 7,918.46

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Solution

The fourth proportional to 13,220.72, 18,244 and 7,918.46 is: 10,927.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.72 : 18,244 = 7,918.46 : x
  2. Step 2: Convert to fraction form
    13,220.72/18,244 = 7,918.46/x
  3. Step 3: Cross multiply
    13,220.72x = 18,244 × 7,918.46
  4. Step 4: Simplify right side
    13,220.72x = 144,464,384.24
  5. Step 5: Solve for x
    x = 144,464,384.24/13,220.72
  6. Step 6: Final answer
    x = 10,927.12

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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.