Home / 38,968.57-53,783.64-21,978.01

Finding the Fourth Proportional to 38,968.57, 53,783.64 and 21,978.01

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Solution

The fourth proportional to 38,968.57, 53,783.64 and 21,978.01 is: 30,333.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,968.57 : 53,783.64 = 21,978.01 : x
  2. Step 2: Convert to fraction form
    38,968.57/53,783.64 = 21,978.01/x
  3. Step 3: Cross multiply
    38,968.57x = 53,783.64 × 21,978.01
  4. Step 4: Simplify right side
    38,968.57x = 1,182,057,377.76
  5. Step 5: Solve for x
    x = 1,182,057,377.76/38,968.57
  6. Step 6: Final answer
    x = 30,333.61

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1.5x scale

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.