Home / 15,513.42-21,408.57-8,439.84

Finding the Fourth Proportional to 15,513.42, 21,408.57 and 8,439.84

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Solution

The fourth proportional to 15,513.42, 21,408.57 and 8,439.84 is: 11,647.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.42 : 21,408.57 = 8,439.84 : x
  2. Step 2: Convert to fraction form
    15,513.42/21,408.57 = 8,439.84/x
  3. Step 3: Cross multiply
    15,513.42x = 21,408.57 × 8,439.84
  4. Step 4: Simplify right side
    15,513.42x = 180,684,905.43
  5. Step 5: Solve for x
    x = 180,684,905.43/15,513.42
  6. Step 6: Final answer
    x = 11,647.01

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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.