Home / 38,780.64-53,513.39-21,783.60

Finding the Fourth Proportional to 38,780.64, 53,513.39 and 21,783.60

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Solution

The fourth proportional to 38,780.64, 53,513.39 and 21,783.60 is: 30,059.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,780.64 : 53,513.39 = 21,783.60 : x
  2. Step 2: Convert to fraction form
    38,780.64/53,513.39 = 21,783.60/x
  3. Step 3: Cross multiply
    38,780.64x = 53,513.39 × 21,783.60
  4. Step 4: Simplify right side
    38,780.64x = 1,165,714,336.86
  5. Step 5: Solve for x
    x = 1,165,714,336.86/38,780.64
  6. Step 6: Final answer
    x = 30,059.18

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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.