Home / 19,986.60-29,979.90-6,839.40

Finding the Fourth Proportional to 19,986.60, 29,979.90 and 6,839.40

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Solution

The fourth proportional to 19,986.60, 29,979.90 and 6,839.40 is: 10,259.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986.60 : 29,979.90 = 6,839.40 : x
  2. Step 2: Convert to fraction form
    19,986.60/29,979.90 = 6,839.40/x
  3. Step 3: Cross multiply
    19,986.60x = 29,979.90 × 6,839.40
  4. Step 4: Simplify right side
    19,986.60x = 205,044,528.06
  5. Step 5: Solve for x
    x = 205,044,528.06/19,986.60
  6. Step 6: Final answer
    x = 10,259.10

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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.