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Finding the Fourth Proportional to 19,783.64, 29,632.80 and 18,620.48

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Solution

The fourth proportional to 19,783.64, 29,632.80 and 18,620.48 is: 27,890.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,783.64 : 29,632.80 = 18,620.48 : x
  2. Step 2: Convert to fraction form
    19,783.64/29,632.80 = 18,620.48/x
  3. Step 3: Cross multiply
    19,783.64x = 29,632.80 × 18,620.48
  4. Step 4: Simplify right side
    19,783.64x = 551,776,959.74
  5. Step 5: Solve for x
    x = 551,776,959.74/19,783.64
  6. Step 6: Final answer
    x = 27,890.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.