Home / 20,968,989.63-31,438,860.68-9,291,009.53

Finding the Fourth Proportional to 20,968,989.63, 31,438,860.68 and 9,291,009.53

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Solution

The fourth proportional to 20,968,989.63, 31,438,860.68 and 9,291,009.53 is: 13,930,034.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968,989.63 : 31,438,860.68 = 9,291,009.53 : x
  2. Step 2: Convert to fraction form
    20,968,989.63/31,438,860.68 = 9,291,009.53/x
  3. Step 3: Cross multiply
    20,968,989.63x = 31,438,860.68 × 9,291,009.53
  4. Step 4: Simplify right side
    20,968,989.63x = 292,098,753,986,572.94
  5. Step 5: Solve for x
    x = 292,098,753,986,572.94/20,968,989.63
  6. Step 6: Final answer
    x = 13,930,034.74

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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.