Home / 18,812.30-28,218.69-12,967.34

Finding the Fourth Proportional to 18,812.30, 28,218.69 and 12,967.34

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Solution

The fourth proportional to 18,812.30, 28,218.69 and 12,967.34 is: 19,451.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.30 : 28,218.69 = 12,967.34 : x
  2. Step 2: Convert to fraction form
    18,812.30/28,218.69 = 12,967.34/x
  3. Step 3: Cross multiply
    18,812.30x = 28,218.69 × 12,967.34
  4. Step 4: Simplify right side
    18,812.30x = 365,921,347.58
  5. Step 5: Solve for x
    x = 365,921,347.58/18,812.30
  6. Step 6: Final answer
    x = 19,451.18

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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.