Home / 20,986,421.34-28,960,873.42-11,438,785.93

Finding the Fourth Proportional to 20,986,421.34, 28,960,873.42 and 11,438,785.93

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Solution

The fourth proportional to 20,986,421.34, 28,960,873.42 and 11,438,785.93 is: 15,785,313.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986,421.34 : 28,960,873.42 = 11,438,785.93 : x
  2. Step 2: Convert to fraction form
    20,986,421.34/28,960,873.42 = 11,438,785.93/x
  3. Step 3: Cross multiply
    20,986,421.34x = 28,960,873.42 × 11,438,785.93
  4. Step 4: Simplify right side
    20,986,421.34x = 331,277,231,421,229.31
  5. Step 5: Solve for x
    x = 331,277,231,421,229.31/20,986,421.34
  6. Step 6: Final answer
    x = 15,785,313.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.