Home / 21,964.40-30,309.66-12,888.54

Finding the Fourth Proportional to 21,964.40, 30,309.66 and 12,888.54

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Solution

The fourth proportional to 21,964.40, 30,309.66 and 12,888.54 is: 17,785.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,964.40 : 30,309.66 = 12,888.54 : x
  2. Step 2: Convert to fraction form
    21,964.40/30,309.66 = 12,888.54/x
  3. Step 3: Cross multiply
    21,964.40x = 30,309.66 × 12,888.54
  4. Step 4: Simplify right side
    21,964.40x = 390,647,313.63
  5. Step 5: Solve for x
    x = 390,647,313.63/21,964.40
  6. Step 6: Final answer
    x = 17,785.48

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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.