Home / 19,807.28-29,678.52-11,992.40

Finding the Fourth Proportional to 19,807.28, 29,678.52 and 11,992.40

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Solution

The fourth proportional to 19,807.28, 29,678.52 and 11,992.40 is: 17,968.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,807.28 : 29,678.52 = 11,992.40 : x
  2. Step 2: Convert to fraction form
    19,807.28/29,678.52 = 11,992.40/x
  3. Step 3: Cross multiply
    19,807.28x = 29,678.52 × 11,992.40
  4. Step 4: Simplify right side
    19,807.28x = 355,916,683.25
  5. Step 5: Solve for x
    x = 355,916,683.25/19,807.28
  6. Step 6: Final answer
    x = 17,968.98

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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.