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Finding the Fourth Proportional to 18,461.83, 27,707.21 and 12,878.86

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Solution

The fourth proportional to 18,461.83, 27,707.21 and 12,878.86 is: 19,328.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.83 : 27,707.21 = 12,878.86 : x
  2. Step 2: Convert to fraction form
    18,461.83/27,707.21 = 12,878.86/x
  3. Step 3: Cross multiply
    18,461.83x = 27,707.21 × 12,878.86
  4. Step 4: Simplify right side
    18,461.83x = 356,837,075.65
  5. Step 5: Solve for x
    x = 356,837,075.65/18,461.83
  6. Step 6: Final answer
    x = 19,328.37

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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.