Home / 21,930.45-30,263.93-11,858.81

Finding the Fourth Proportional to 21,930.45, 30,263.93 and 11,858.81

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Solution

The fourth proportional to 21,930.45, 30,263.93 and 11,858.81 is: 16,365.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,930.45 : 30,263.93 = 11,858.81 : x
  2. Step 2: Convert to fraction form
    21,930.45/30,263.93 = 11,858.81/x
  3. Step 3: Cross multiply
    21,930.45x = 30,263.93 × 11,858.81
  4. Step 4: Simplify right side
    21,930.45x = 358,894,029.58
  5. Step 5: Solve for x
    x = 358,894,029.58/21,930.45
  6. Step 6: Final answer
    x = 16,365.10

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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.