Home / 20,405,646.12-28,126,971.04-13,788,168.66

Finding the Fourth Proportional to 20,405,646.12, 28,126,971.04 and 13,788,168.66

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Solution

The fourth proportional to 20,405,646.12, 28,126,971.04 and 13,788,168.66 is: 19,005,495.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405,646.12 : 28,126,971.04 = 13,788,168.66 : x
  2. Step 2: Convert to fraction form
    20,405,646.12/28,126,971.04 = 13,788,168.66/x
  3. Step 3: Cross multiply
    20,405,646.12x = 28,126,971.04 × 13,788,168.66
  4. Step 4: Simplify right side
    20,405,646.12x = 387,819,420,594,455.62
  5. Step 5: Solve for x
    x = 387,819,420,594,455.62/20,405,646.12
  6. Step 6: Final answer
    x = 19,005,495.75

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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.