Home / 30,539.20-45,815.34-9,478.80

Finding the Fourth Proportional to 30,539.20, 45,815.34 and 9,478.80

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Solution

The fourth proportional to 30,539.20, 45,815.34 and 9,478.80 is: 14,220.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,539.20 : 45,815.34 = 9,478.80 : x
  2. Step 2: Convert to fraction form
    30,539.20/45,815.34 = 9,478.80/x
  3. Step 3: Cross multiply
    30,539.20x = 45,815.34 × 9,478.80
  4. Step 4: Simplify right side
    30,539.20x = 434,274,444.79
  5. Step 5: Solve for x
    x = 434,274,444.79/30,539.20
  6. Step 6: Final answer
    x = 14,220.23

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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.