Home / 19,986.40-29,979.60-19,133.20

Finding the Fourth Proportional to 19,986.40, 29,979.60 and 19,133.20

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Solution

The fourth proportional to 19,986.40, 29,979.60 and 19,133.20 is: 28,699.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986.40 : 29,979.60 = 19,133.20 : x
  2. Step 2: Convert to fraction form
    19,986.40/29,979.60 = 19,133.20/x
  3. Step 3: Cross multiply
    19,986.40x = 29,979.60 × 19,133.20
  4. Step 4: Simplify right side
    19,986.40x = 573,605,682.72
  5. Step 5: Solve for x
    x = 573,605,682.72/19,986.40
  6. Step 6: Final answer
    x = 28,699.80

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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.