Home / 13,408.81-18,501.28-9,103.39

Finding the Fourth Proportional to 13,408.81, 18,501.28 and 9,103.39

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Solution

The fourth proportional to 13,408.81, 18,501.28 and 9,103.39 is: 12,560.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.81 : 18,501.28 = 9,103.39 : x
  2. Step 2: Convert to fraction form
    13,408.81/18,501.28 = 9,103.39/x
  3. Step 3: Cross multiply
    13,408.81x = 18,501.28 × 9,103.39
  4. Step 4: Simplify right side
    13,408.81x = 168,424,298.33
  5. Step 5: Solve for x
    x = 168,424,298.33/13,408.81
  6. Step 6: Final answer
    x = 12,560.72

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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.