Home / 20,985,768.93-28,960,421.11-12,166,934.06

Finding the Fourth Proportional to 20,985,768.93, 28,960,421.11 and 12,166,934.06

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Solution

The fourth proportional to 20,985,768.93, 28,960,421.11 and 12,166,934.06 is: 16,790,403.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985,768.93 : 28,960,421.11 = 12,166,934.06 : x
  2. Step 2: Convert to fraction form
    20,985,768.93/28,960,421.11 = 12,166,934.06/x
  3. Step 3: Cross multiply
    20,985,768.93x = 28,960,421.11 × 12,166,934.06
  4. Step 4: Simplify right side
    20,985,768.93x = 352,359,533,819,982.56
  5. Step 5: Solve for x
    x = 352,359,533,819,982.56/20,985,768.93
  6. Step 6: Final answer
    x = 16,790,403.77

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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.