Home / 13,280.40-18,328.73-8,578.35

Finding the Fourth Proportional to 13,280.40, 18,328.73 and 8,578.35

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Solution

The fourth proportional to 13,280.40, 18,328.73 and 8,578.35 is: 11,839.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.40 : 18,328.73 = 8,578.35 : x
  2. Step 2: Convert to fraction form
    13,280.40/18,328.73 = 8,578.35/x
  3. Step 3: Cross multiply
    13,280.40x = 18,328.73 × 8,578.35
  4. Step 4: Simplify right side
    13,280.40x = 157,230,218.10
  5. Step 5: Solve for x
    x = 157,230,218.10/13,280.40
  6. Step 6: Final answer
    x = 11,839.27

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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.