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Finding the Fourth Proportional to 19,315.36, 28,971.48 and 7,628.68

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Solution

The fourth proportional to 19,315.36, 28,971.48 and 7,628.68 is: 11,442.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,315.36 : 28,971.48 = 7,628.68 : x
  2. Step 2: Convert to fraction form
    19,315.36/28,971.48 = 7,628.68/x
  3. Step 3: Cross multiply
    19,315.36x = 28,971.48 × 7,628.68
  4. Step 4: Simplify right side
    19,315.36x = 221,014,150.05
  5. Step 5: Solve for x
    x = 221,014,150.05/19,315.36
  6. Step 6: Final answer
    x = 11,442.40

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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.