Home / 20,915,920.40-31,373,880.60-9,578,512.40

Finding the Fourth Proportional to 20,915,920.40, 31,373,880.60 and 9,578,512.40

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Solution

The fourth proportional to 20,915,920.40, 31,373,880.60 and 9,578,512.40 is: 14,367,768.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915,920.40 : 31,373,880.60 = 9,578,512.40 : x
  2. Step 2: Convert to fraction form
    20,915,920.40/31,373,880.60 = 9,578,512.40/x
  3. Step 3: Cross multiply
    20,915,920.40x = 31,373,880.60 × 9,578,512.40
  4. Step 4: Simplify right side
    20,915,920.40x = 300,515,104,363,219.44
  5. Step 5: Solve for x
    x = 300,515,104,363,219.44/20,915,920.40
  6. Step 6: Final answer
    x = 14,367,768.60

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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.