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Finding the Fourth Proportional to 21,920.55, 30,250.50 and 11,848.98

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Solution

The fourth proportional to 21,920.55, 30,250.50 and 11,848.98 is: 16,351.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920.55 : 30,250.50 = 11,848.98 : x
  2. Step 2: Convert to fraction form
    21,920.55/30,250.50 = 11,848.98/x
  3. Step 3: Cross multiply
    21,920.55x = 30,250.50 × 11,848.98
  4. Step 4: Simplify right side
    21,920.55x = 358,437,569.49
  5. Step 5: Solve for x
    x = 358,437,569.49/21,920.55
  6. Step 6: Final answer
    x = 16,351.67

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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.