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Finding the Fourth Proportional to 15,768.84, 21,741.03 and 10,390.44

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Solution

The fourth proportional to 15,768.84, 21,741.03 and 10,390.44 is: 14,325.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,768.84 : 21,741.03 = 10,390.44 : x
  2. Step 2: Convert to fraction form
    15,768.84/21,741.03 = 10,390.44/x
  3. Step 3: Cross multiply
    15,768.84x = 21,741.03 × 10,390.44
  4. Step 4: Simplify right side
    15,768.84x = 225,898,867.75
  5. Step 5: Solve for x
    x = 225,898,867.75/15,768.84
  6. Step 6: Final answer
    x = 14,325.65

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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.