Home / 19,281.78-28,930.86-8,190.84

Finding the Fourth Proportional to 19,281.78, 28,930.86 and 8,190.84

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Solution

The fourth proportional to 19,281.78, 28,930.86 and 8,190.84 is: 12,289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,281.78 : 28,930.86 = 8,190.84 : x
  2. Step 2: Convert to fraction form
    19,281.78/28,930.86 = 8,190.84/x
  3. Step 3: Cross multiply
    19,281.78x = 28,930.86 × 8,190.84
  4. Step 4: Simplify right side
    19,281.78x = 236,968,045.32
  5. Step 5: Solve for x
    x = 236,968,045.32/19,281.78
  6. Step 6: Final answer
    x = 12,289.74

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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.