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Finding the Fourth Proportional to 19,274, 28,921.80 and 19,127.12

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Solution

The fourth proportional to 19,274, 28,921.80 and 19,127.12 is: 28,701.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,274 : 28,921.80 = 19,127.12 : x
  2. Step 2: Convert to fraction form
    19,274/28,921.80 = 19,127.12/x
  3. Step 3: Cross multiply
    19,274x = 28,921.80 × 19,127.12
  4. Step 4: Simplify right side
    19,274x = 553,190,739.22
  5. Step 5: Solve for x
    x = 553,190,739.22/19,274
  6. Step 6: Final answer
    x = 28,701.40

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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.