Home / 20,678,939.55-31,004,045.19-9,158,128.83

Finding the Fourth Proportional to 20,678,939.55, 31,004,045.19 and 9,158,128.83

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Solution

The fourth proportional to 20,678,939.55, 31,004,045.19 and 9,158,128.83 is: 13,730,831.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678,939.55 : 31,004,045.19 = 9,158,128.83 : x
  2. Step 2: Convert to fraction form
    20,678,939.55/31,004,045.19 = 9,158,128.83/x
  3. Step 3: Cross multiply
    20,678,939.55x = 31,004,045.19 × 9,158,128.83
  4. Step 4: Simplify right side
    20,678,939.55x = 283,939,040,101,161.81
  5. Step 5: Solve for x
    x = 283,939,040,101,161.81/20,678,939.55
  6. Step 6: Final answer
    x = 13,730,831.77

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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.