Home / 18,905.78-26,085.16-12,619.37

Finding the Fourth Proportional to 18,905.78, 26,085.16 and 12,619.37

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Solution

The fourth proportional to 18,905.78, 26,085.16 and 12,619.37 is: 17,411.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.78 : 26,085.16 = 12,619.37 : x
  2. Step 2: Convert to fraction form
    18,905.78/26,085.16 = 12,619.37/x
  3. Step 3: Cross multiply
    18,905.78x = 26,085.16 × 12,619.37
  4. Step 4: Simplify right side
    18,905.78x = 329,178,285.55
  5. Step 5: Solve for x
    x = 329,178,285.55/18,905.78
  6. Step 6: Final answer
    x = 17,411.52

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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.