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Finding the Fourth Proportional to 28,653.91, 42,998.14 and 12,237.91

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Solution

The fourth proportional to 28,653.91, 42,998.14 and 12,237.91 is: 18,364.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,653.91 : 42,998.14 = 12,237.91 : x
  2. Step 2: Convert to fraction form
    28,653.91/42,998.14 = 12,237.91/x
  3. Step 3: Cross multiply
    28,653.91x = 42,998.14 × 12,237.91
  4. Step 4: Simplify right side
    28,653.91x = 526,207,367.49
  5. Step 5: Solve for x
    x = 526,207,367.49/28,653.91
  6. Step 6: Final answer
    x = 18,364.24

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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.