Home / 21,818.57-30,109.52-12,258.95

Finding the Fourth Proportional to 21,818.57, 30,109.52 and 12,258.95

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Solution

The fourth proportional to 21,818.57, 30,109.52 and 12,258.95 is: 16,917.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.57 : 30,109.52 = 12,258.95 : x
  2. Step 2: Convert to fraction form
    21,818.57/30,109.52 = 12,258.95/x
  3. Step 3: Cross multiply
    21,818.57x = 30,109.52 × 12,258.95
  4. Step 4: Simplify right side
    21,818.57x = 369,110,980.30
  5. Step 5: Solve for x
    x = 369,110,980.30/21,818.57
  6. Step 6: Final answer
    x = 16,917.29

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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.