Home / 19,010.40-28,515.60-12,789.60

Finding the Fourth Proportional to 19,010.40, 28,515.60 and 12,789.60

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Solution

The fourth proportional to 19,010.40, 28,515.60 and 12,789.60 is: 19,184.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,010.40 : 28,515.60 = 12,789.60 : x
  2. Step 2: Convert to fraction form
    19,010.40/28,515.60 = 12,789.60/x
  3. Step 3: Cross multiply
    19,010.40x = 28,515.60 × 12,789.60
  4. Step 4: Simplify right side
    19,010.40x = 364,703,117.76
  5. Step 5: Solve for x
    x = 364,703,117.76/19,010.40
  6. Step 6: Final answer
    x = 19,184.40

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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.