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Finding the Fourth Proportional to 21,650.76, 29,783.70 and 18,950.76

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Solution

The fourth proportional to 21,650.76, 29,783.70 and 18,950.76 is: 26,069.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,650.76 : 29,783.70 = 18,950.76 : x
  2. Step 2: Convert to fraction form
    21,650.76/29,783.70 = 18,950.76/x
  3. Step 3: Cross multiply
    21,650.76x = 29,783.70 × 18,950.76
  4. Step 4: Simplify right side
    21,650.76x = 564,423,750.61
  5. Step 5: Solve for x
    x = 564,423,750.61/21,650.76
  6. Step 6: Final answer
    x = 26,069.47

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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.