Home / 28,905.90-43,358.85-9,186.45

Finding the Fourth Proportional to 28,905.90, 43,358.85 and 9,186.45

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Solution

The fourth proportional to 28,905.90, 43,358.85 and 9,186.45 is: 13,779.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,905.90 : 43,358.85 = 9,186.45 : x
  2. Step 2: Convert to fraction form
    28,905.90/43,358.85 = 9,186.45/x
  3. Step 3: Cross multiply
    28,905.90x = 43,358.85 × 9,186.45
  4. Step 4: Simplify right side
    28,905.90x = 398,313,907.58
  5. Step 5: Solve for x
    x = 398,313,907.58/28,905.90
  6. Step 6: Final answer
    x = 13,779.68

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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.