Home / 14,378.51-21,540.13-8,815.64

Finding the Fourth Proportional to 14,378.51, 21,540.13 and 8,815.64

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Solution

The fourth proportional to 14,378.51, 21,540.13 and 8,815.64 is: 13,206.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,378.51 : 21,540.13 = 8,815.64 : x
  2. Step 2: Convert to fraction form
    14,378.51/21,540.13 = 8,815.64/x
  3. Step 3: Cross multiply
    14,378.51x = 21,540.13 × 8,815.64
  4. Step 4: Simplify right side
    14,378.51x = 189,889,901.89
  5. Step 5: Solve for x
    x = 189,889,901.89/14,378.51
  6. Step 6: Final answer
    x = 13,206.51

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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.