Home / 7,280,857.20-10,921,285.80-7,139,139.60

Finding the Fourth Proportional to 7,280,857.20, 10,921,285.80 and 7,139,139.60

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Solution

The fourth proportional to 7,280,857.20, 10,921,285.80 and 7,139,139.60 is: 10,708,709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280,857.20 : 10,921,285.80 = 7,139,139.60 : x
  2. Step 2: Convert to fraction form
    7,280,857.20/10,921,285.80 = 7,139,139.60/x
  3. Step 3: Cross multiply
    7,280,857.20x = 10,921,285.80 × 7,139,139.60
  4. Step 4: Simplify right side
    7,280,857.20x = 77,968,583,937,697.69
  5. Step 5: Solve for x
    x = 77,968,583,937,697.69/7,280,857.20
  6. Step 6: Final answer
    x = 10,708,709.40

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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.