Home / 13,487.49-18,612.47-7,518.80

Finding the Fourth Proportional to 13,487.49, 18,612.47 and 7,518.80

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Solution

The fourth proportional to 13,487.49, 18,612.47 and 7,518.80 is: 10,375.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.49 : 18,612.47 = 7,518.80 : x
  2. Step 2: Convert to fraction form
    13,487.49/18,612.47 = 7,518.80/x
  3. Step 3: Cross multiply
    13,487.49x = 18,612.47 × 7,518.80
  4. Step 4: Simplify right side
    13,487.49x = 139,943,439.44
  5. Step 5: Solve for x
    x = 139,943,439.44/13,487.49
  6. Step 6: Final answer
    x = 10,375.80

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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.