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Finding the Fourth Proportional to 15,937.55, 21,993.49 and 8,863.51

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Solution

The fourth proportional to 15,937.55, 21,993.49 and 8,863.51 is: 12,231.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,937.55 : 21,993.49 = 8,863.51 : x
  2. Step 2: Convert to fraction form
    15,937.55/21,993.49 = 8,863.51/x
  3. Step 3: Cross multiply
    15,937.55x = 21,993.49 × 8,863.51
  4. Step 4: Simplify right side
    15,937.55x = 194,939,518.55
  5. Step 5: Solve for x
    x = 194,939,518.55/15,937.55
  6. Step 6: Final answer
    x = 12,231.46

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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.