Home / 28,489,889-39,316,081.38-15,437,137.80

Finding the Fourth Proportional to 28,489,889, 39,316,081.38 and 15,437,137.80

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Solution

The fourth proportional to 28,489,889, 39,316,081.38 and 15,437,137.80 is: 21,303,268.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489,889 : 39,316,081.38 = 15,437,137.80 : x
  2. Step 2: Convert to fraction form
    28,489,889/39,316,081.38 = 15,437,137.80/x
  3. Step 3: Cross multiply
    28,489,889x = 39,316,081.38 × 15,437,137.80
  4. Step 4: Simplify right side
    28,489,889x = 606,927,766,019,074.25
  5. Step 5: Solve for x
    x = 606,927,766,019,074.25/28,489,889
  6. Step 6: Final answer
    x = 21,303,268.89

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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.