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Finding the Fourth Proportional to 21,795, 30,019.80 and 16,749.56

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Solution

The fourth proportional to 21,795, 30,019.80 and 16,749.56 is: 23,070.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,795 : 30,019.80 = 16,749.56 : x
  2. Step 2: Convert to fraction form
    21,795/30,019.80 = 16,749.56/x
  3. Step 3: Cross multiply
    21,795x = 30,019.80 × 16,749.56
  4. Step 4: Simplify right side
    21,795x = 502,818,441.29
  5. Step 5: Solve for x
    x = 502,818,441.29/21,795
  6. Step 6: Final answer
    x = 23,070.36

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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.