Home / 11,238.90-16,858.35-9,780.90

Finding the Fourth Proportional to 11,238.90, 16,858.35 and 9,780.90

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Solution

The fourth proportional to 11,238.90, 16,858.35 and 9,780.90 is: 14,671.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,238.90 : 16,858.35 = 9,780.90 : x
  2. Step 2: Convert to fraction form
    11,238.90/16,858.35 = 9,780.90/x
  3. Step 3: Cross multiply
    11,238.90x = 16,858.35 × 9,780.90
  4. Step 4: Simplify right side
    11,238.90x = 164,889,835.52
  5. Step 5: Solve for x
    x = 164,889,835.52/11,238.90
  6. Step 6: Final answer
    x = 14,671.35

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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.