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Finding the Fourth Proportional to 20,315.20, 30,413.40 and 14,483.20

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Solution

The fourth proportional to 20,315.20, 30,413.40 and 14,483.20 is: 21,682.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.20 : 30,413.40 = 14,483.20 : x
  2. Step 2: Convert to fraction form
    20,315.20/30,413.40 = 14,483.20/x
  3. Step 3: Cross multiply
    20,315.20x = 30,413.40 × 14,483.20
  4. Step 4: Simplify right side
    20,315.20x = 440,483,354.88
  5. Step 5: Solve for x
    x = 440,483,354.88/20,315.20
  6. Step 6: Final answer
    x = 21,682.45

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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.