Home / 15,783.64-21,781.38-9,069.74

Finding the Fourth Proportional to 15,783.64, 21,781.38 and 9,069.74

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Solution

The fourth proportional to 15,783.64, 21,781.38 and 9,069.74 is: 12,516.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,783.64 : 21,781.38 = 9,069.74 : x
  2. Step 2: Convert to fraction form
    15,783.64/21,781.38 = 9,069.74/x
  3. Step 3: Cross multiply
    15,783.64x = 21,781.38 × 9,069.74
  4. Step 4: Simplify right side
    15,783.64x = 197,551,453.44
  5. Step 5: Solve for x
    x = 197,551,453.44/15,783.64
  6. Step 6: Final answer
    x = 12,516.22

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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.