Home / 30,280,367.20-45,345,901.20-20,128,021.60

Finding the Fourth Proportional to 30,280,367.20, 45,345,901.20 and 20,128,021.60

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Solution

The fourth proportional to 30,280,367.20, 45,345,901.20 and 20,128,021.60 is: 30,142,411.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,280,367.20 : 45,345,901.20 = 20,128,021.60 : x
  2. Step 2: Convert to fraction form
    30,280,367.20/45,345,901.20 = 20,128,021.60/x
  3. Step 3: Cross multiply
    30,280,367.20x = 45,345,901.20 × 20,128,021.60
  4. Step 4: Simplify right side
    30,280,367.20x = 912,723,278,825,066
  5. Step 5: Solve for x
    x = 912,723,278,825,066/30,280,367.20
  6. Step 6: Final answer
    x = 30,142,411.18

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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.