Home / 19,986.28-29,979.54-8,890.36

Finding the Fourth Proportional to 19,986.28, 29,979.54 and 8,890.36

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Solution

The fourth proportional to 19,986.28, 29,979.54 and 8,890.36 is: 13,335.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986.28 : 29,979.54 = 8,890.36 : x
  2. Step 2: Convert to fraction form
    19,986.28/29,979.54 = 8,890.36/x
  3. Step 3: Cross multiply
    19,986.28x = 29,979.54 × 8,890.36
  4. Step 4: Simplify right side
    19,986.28x = 266,528,903.23
  5. Step 5: Solve for x
    x = 266,528,903.23/19,986.28
  6. Step 6: Final answer
    x = 13,335.59

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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.