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Finding the Fourth Proportional to 21,803.79, 30,081.50 and 14,254.47

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Solution

The fourth proportional to 21,803.79, 30,081.50 and 14,254.47 is: 19,666.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,803.79 : 30,081.50 = 14,254.47 : x
  2. Step 2: Convert to fraction form
    21,803.79/30,081.50 = 14,254.47/x
  3. Step 3: Cross multiply
    21,803.79x = 30,081.50 × 14,254.47
  4. Step 4: Simplify right side
    21,803.79x = 428,795,768.03
  5. Step 5: Solve for x
    x = 428,795,768.03/21,803.79
  6. Step 6: Final answer
    x = 19,666.11

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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.