Home / 28,374.96-39,164.40-19,918.56

Finding the Fourth Proportional to 28,374.96, 39,164.40 and 19,918.56

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Solution

The fourth proportional to 28,374.96, 39,164.40 and 19,918.56 is: 27,492.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,374.96 : 39,164.40 = 19,918.56 : x
  2. Step 2: Convert to fraction form
    28,374.96/39,164.40 = 19,918.56/x
  3. Step 3: Cross multiply
    28,374.96x = 39,164.40 × 19,918.56
  4. Step 4: Simplify right side
    28,374.96x = 780,098,451.26
  5. Step 5: Solve for x
    x = 780,098,451.26/28,374.96
  6. Step 6: Final answer
    x = 27,492.50

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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.