Home / 20,809,771.86-31,152,466.69-12,587,531.11

Finding the Fourth Proportional to 20,809,771.86, 31,152,466.69 and 12,587,531.11

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Solution

The fourth proportional to 20,809,771.86, 31,152,466.69 and 12,587,531.11 is: 18,843,678.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809,771.86 : 31,152,466.69 = 12,587,531.11 : x
  2. Step 2: Convert to fraction form
    20,809,771.86/31,152,466.69 = 12,587,531.11/x
  3. Step 3: Cross multiply
    20,809,771.86x = 31,152,466.69 × 12,587,531.11
  4. Step 4: Simplify right side
    20,809,771.86x = 392,132,643,613,613.75
  5. Step 5: Solve for x
    x = 392,132,643,613,613.75/20,809,771.86
  6. Step 6: Final answer
    x = 18,843,678.16

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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.