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Finding the Fourth Proportional to 21,700.74, 29,893.46 and 18,503.63

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Solution

The fourth proportional to 21,700.74, 29,893.46 and 18,503.63 is: 25,489.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,700.74 : 29,893.46 = 18,503.63 : x
  2. Step 2: Convert to fraction form
    21,700.74/29,893.46 = 18,503.63/x
  3. Step 3: Cross multiply
    21,700.74x = 29,893.46 × 18,503.63
  4. Step 4: Simplify right side
    21,700.74x = 553,137,523.26
  5. Step 5: Solve for x
    x = 553,137,523.26/21,700.74
  6. Step 6: Final answer
    x = 25,489.34

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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.