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Finding the Fourth Proportional to 18,658,900.80, 28,000,792.80 and 10,571,860.80

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Solution

The fourth proportional to 18,658,900.80, 28,000,792.80 and 10,571,860.80 is: 15,864,840.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658,900.80 : 28,000,792.80 = 10,571,860.80 : x
  2. Step 2: Convert to fraction form
    18,658,900.80/28,000,792.80 = 10,571,860.80/x
  3. Step 3: Cross multiply
    18,658,900.80x = 28,000,792.80 × 10,571,860.80
  4. Step 4: Simplify right side
    18,658,900.80x = 296,020,483,771,242.25
  5. Step 5: Solve for x
    x = 296,020,483,771,242.25/18,658,900.80
  6. Step 6: Final answer
    x = 15,864,840.43

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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.