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Finding the Fourth Proportional to 13,885.65, 20,828.49 and 4,651.65

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Solution

The fourth proportional to 13,885.65, 20,828.49 and 4,651.65 is: 6,977.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,885.65 : 20,828.49 = 4,651.65 : x
  2. Step 2: Convert to fraction form
    13,885.65/20,828.49 = 4,651.65/x
  3. Step 3: Cross multiply
    13,885.65x = 20,828.49 × 4,651.65
  4. Step 4: Simplify right side
    13,885.65x = 96,886,845.51
  5. Step 5: Solve for x
    x = 96,886,845.51/13,885.65
  6. Step 6: Final answer
    x = 6,977.48

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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.