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Finding the Fourth Proportional to 21,739.46, 29,885.02 and 18,703.46

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Solution

The fourth proportional to 21,739.46, 29,885.02 and 18,703.46 is: 25,711.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,739.46 : 29,885.02 = 18,703.46 : x
  2. Step 2: Convert to fraction form
    21,739.46/29,885.02 = 18,703.46/x
  3. Step 3: Cross multiply
    21,739.46x = 29,885.02 × 18,703.46
  4. Step 4: Simplify right side
    21,739.46x = 558,953,276.17
  5. Step 5: Solve for x
    x = 558,953,276.17/21,739.46
  6. Step 6: Final answer
    x = 25,711.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.