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Finding the Fourth Proportional to 13,339, 18,408.90 and 7,751.08

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Solution

The fourth proportional to 13,339, 18,408.90 and 7,751.08 is: 10,697.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339 : 18,408.90 = 7,751.08 : x
  2. Step 2: Convert to fraction form
    13,339/18,408.90 = 7,751.08/x
  3. Step 3: Cross multiply
    13,339x = 18,408.90 × 7,751.08
  4. Step 4: Simplify right side
    13,339x = 142,688,856.61
  5. Step 5: Solve for x
    x = 142,688,856.61/13,339
  6. Step 6: Final answer
    x = 10,697.12

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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.