Home / 18,689,589.40-28,039,632.90-9,105,280.60

Finding the Fourth Proportional to 18,689,589.40, 28,039,632.90 and 9,105,280.60

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Solution

The fourth proportional to 18,689,589.40, 28,039,632.90 and 9,105,280.60 is: 13,660,478.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689,589.40 : 28,039,632.90 = 9,105,280.60 : x
  2. Step 2: Convert to fraction form
    18,689,589.40/28,039,632.90 = 9,105,280.60/x
  3. Step 3: Cross multiply
    18,689,589.40x = 28,039,632.90 × 9,105,280.60
  4. Step 4: Simplify right side
    18,689,589.40x = 255,308,725,475,491.72
  5. Step 5: Solve for x
    x = 255,308,725,475,491.72/18,689,589.40
  6. Step 6: Final answer
    x = 13,660,478.03

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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.