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Finding the Fourth Proportional to 15,903.70, 21,949.08 and 9,189.34

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Solution

The fourth proportional to 15,903.70, 21,949.08 and 9,189.34 is: 12,682.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,903.70 : 21,949.08 = 9,189.34 : x
  2. Step 2: Convert to fraction form
    15,903.70/21,949.08 = 9,189.34/x
  3. Step 3: Cross multiply
    15,903.70x = 21,949.08 × 9,189.34
  4. Step 4: Simplify right side
    15,903.70x = 201,697,558.81
  5. Step 5: Solve for x
    x = 201,697,558.81/15,903.70
  6. Step 6: Final answer
    x = 12,682.43

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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.