Home / 18,678,400.20-28,017,600.30-5,215,206.60

Finding the Fourth Proportional to 18,678,400.20, 28,017,600.30 and 5,215,206.60

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Solution

The fourth proportional to 18,678,400.20, 28,017,600.30 and 5,215,206.60 is: 7,822,809.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678,400.20 : 28,017,600.30 = 5,215,206.60 : x
  2. Step 2: Convert to fraction form
    18,678,400.20/28,017,600.30 = 5,215,206.60/x
  3. Step 3: Cross multiply
    18,678,400.20x = 28,017,600.30 × 5,215,206.60
  4. Step 4: Simplify right side
    18,678,400.20x = 146,117,574,000,721.97
  5. Step 5: Solve for x
    x = 146,117,574,000,721.97/18,678,400.20
  6. Step 6: Final answer
    x = 7,822,809.90

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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.