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Finding the Fourth Proportional to 30,908.80, 46,363.20 and 15,356.80

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Solution

The fourth proportional to 30,908.80, 46,363.20 and 15,356.80 is: 23,035.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,908.80 : 46,363.20 = 15,356.80 : x
  2. Step 2: Convert to fraction form
    30,908.80/46,363.20 = 15,356.80/x
  3. Step 3: Cross multiply
    30,908.80x = 46,363.20 × 15,356.80
  4. Step 4: Simplify right side
    30,908.80x = 711,990,389.76
  5. Step 5: Solve for x
    x = 711,990,389.76/30,908.80
  6. Step 6: Final answer
    x = 23,035.20

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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.