Home / 12,048.60-18,111.78-11,990.28

Finding the Fourth Proportional to 12,048.60, 18,111.78 and 11,990.28

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Solution

The fourth proportional to 12,048.60, 18,111.78 and 11,990.28 is: 18,024.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,048.60 : 18,111.78 = 11,990.28 : x
  2. Step 2: Convert to fraction form
    12,048.60/18,111.78 = 11,990.28/x
  3. Step 3: Cross multiply
    12,048.60x = 18,111.78 × 11,990.28
  4. Step 4: Simplify right side
    12,048.60x = 217,165,313.50
  5. Step 5: Solve for x
    x = 217,165,313.50/12,048.60
  6. Step 6: Final answer
    x = 18,024.11

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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.