Home / 12,120.07-16,720.08-7,084.50

Finding the Fourth Proportional to 12,120.07, 16,720.08 and 7,084.50

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Solution

The fourth proportional to 12,120.07, 16,720.08 and 7,084.50 is: 9,773.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.07 : 16,720.08 = 7,084.50 : x
  2. Step 2: Convert to fraction form
    12,120.07/16,720.08 = 7,084.50/x
  3. Step 3: Cross multiply
    12,120.07x = 16,720.08 × 7,084.50
  4. Step 4: Simplify right side
    12,120.07x = 118,453,371.34
  5. Step 5: Solve for x
    x = 118,453,371.34/12,120.07
  6. Step 6: Final answer
    x = 9,773.33

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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.