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Finding the Fourth Proportional to 13,791.64, 19,030.80 and 7,823.02

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Solution

The fourth proportional to 13,791.64, 19,030.80 and 7,823.02 is: 10,794.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.64 : 19,030.80 = 7,823.02 : x
  2. Step 2: Convert to fraction form
    13,791.64/19,030.80 = 7,823.02/x
  3. Step 3: Cross multiply
    13,791.64x = 19,030.80 × 7,823.02
  4. Step 4: Simplify right side
    13,791.64x = 148,878,329.02
  5. Step 5: Solve for x
    x = 148,878,329.02/13,791.64
  6. Step 6: Final answer
    x = 10,794.82

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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.