Home / 13,578.84-20,321.28-9,390.74

Finding the Fourth Proportional to 13,578.84, 20,321.28 and 9,390.74

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Solution

The fourth proportional to 13,578.84, 20,321.28 and 9,390.74 is: 14,053.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.84 : 20,321.28 = 9,390.74 : x
  2. Step 2: Convert to fraction form
    13,578.84/20,321.28 = 9,390.74/x
  3. Step 3: Cross multiply
    13,578.84x = 20,321.28 × 9,390.74
  4. Step 4: Simplify right side
    13,578.84x = 190,831,755.34
  5. Step 5: Solve for x
    x = 190,831,755.34/13,578.84
  6. Step 6: Final answer
    x = 14,053.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.