Home / 30,902,236.16-42,652,924.80-21,116,641.28

Finding the Fourth Proportional to 30,902,236.16, 42,652,924.80 and 21,116,641.28

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Solution

The fourth proportional to 30,902,236.16, 42,652,924.80 and 21,116,641.28 is: 29,146,321.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,902,236.16 : 42,652,924.80 = 21,116,641.28 : x
  2. Step 2: Convert to fraction form
    30,902,236.16/42,652,924.80 = 21,116,641.28/x
  3. Step 3: Cross multiply
    30,902,236.16x = 42,652,924.80 × 21,116,641.28
  4. Step 4: Simplify right side
    30,902,236.16x = 900,686,512,544,415.75
  5. Step 5: Solve for x
    x = 900,686,512,544,415.75/30,902,236.16
  6. Step 6: Final answer
    x = 29,146,321.58

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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.