Home / 12,809.93-19,218.60-5,312.09

Finding the Fourth Proportional to 12,809.93, 19,218.60 and 5,312.09

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Solution

The fourth proportional to 12,809.93, 19,218.60 and 5,312.09 is: 7,969.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,809.93 : 19,218.60 = 5,312.09 : x
  2. Step 2: Convert to fraction form
    12,809.93/19,218.60 = 5,312.09/x
  3. Step 3: Cross multiply
    12,809.93x = 19,218.60 × 5,312.09
  4. Step 4: Simplify right side
    12,809.93x = 102,090,932.87
  5. Step 5: Solve for x
    x = 102,090,932.87/12,809.93
  6. Step 6: Final answer
    x = 7,969.67

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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.