Home / 9,989,456.42-13,785,449.89-5,405,777.80

Finding the Fourth Proportional to 9,989,456.42, 13,785,449.89 and 5,405,777.80

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Solution

The fourth proportional to 9,989,456.42, 13,785,449.89 and 5,405,777.80 is: 7,459,973.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989,456.42 : 13,785,449.89 = 5,405,777.80 : x
  2. Step 2: Convert to fraction form
    9,989,456.42/13,785,449.89 = 5,405,777.80/x
  3. Step 3: Cross multiply
    9,989,456.42x = 13,785,449.89 × 5,405,777.80
  4. Step 4: Simplify right side
    9,989,456.42x = 74,521,078,909,447.19
  5. Step 5: Solve for x
    x = 74,521,078,909,447.19/9,989,456.42
  6. Step 6: Final answer
    x = 7,459,973.37

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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.