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Finding the Fourth Proportional to 21,812.52, 30,101.64 and 21,058.20

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Solution

The fourth proportional to 21,812.52, 30,101.64 and 21,058.20 is: 29,060.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,812.52 : 30,101.64 = 21,058.20 : x
  2. Step 2: Convert to fraction form
    21,812.52/30,101.64 = 21,058.20/x
  3. Step 3: Cross multiply
    21,812.52x = 30,101.64 × 21,058.20
  4. Step 4: Simplify right side
    21,812.52x = 633,886,355.45
  5. Step 5: Solve for x
    x = 633,886,355.45/21,812.52
  6. Step 6: Final answer
    x = 29,060.67

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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.