Home / 19,079.40-28,619.10-12,858.60

Finding the Fourth Proportional to 19,079.40, 28,619.10 and 12,858.60

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Solution

The fourth proportional to 19,079.40, 28,619.10 and 12,858.60 is: 19,287.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,079.40 : 28,619.10 = 12,858.60 : x
  2. Step 2: Convert to fraction form
    19,079.40/28,619.10 = 12,858.60/x
  3. Step 3: Cross multiply
    19,079.40x = 28,619.10 × 12,858.60
  4. Step 4: Simplify right side
    19,079.40x = 368,001,559.26
  5. Step 5: Solve for x
    x = 368,001,559.26/19,079.40
  6. Step 6: Final answer
    x = 19,287.90

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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.