Home / 12,189.84-18,289.80-6,647.04

Finding the Fourth Proportional to 12,189.84, 18,289.80 and 6,647.04

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Solution

The fourth proportional to 12,189.84, 18,289.80 and 6,647.04 is: 9,973.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,189.84 : 18,289.80 = 6,647.04 : x
  2. Step 2: Convert to fraction form
    12,189.84/18,289.80 = 6,647.04/x
  3. Step 3: Cross multiply
    12,189.84x = 18,289.80 × 6,647.04
  4. Step 4: Simplify right side
    12,189.84x = 121,573,032.19
  5. Step 5: Solve for x
    x = 121,573,032.19/12,189.84
  6. Step 6: Final answer
    x = 9,973.31

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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.