Home / 13,280.68-18,339.78-8,321.32

Finding the Fourth Proportional to 13,280.68, 18,339.78 and 8,321.32

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Solution

The fourth proportional to 13,280.68, 18,339.78 and 8,321.32 is: 11,491.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.68 : 18,339.78 = 8,321.32 : x
  2. Step 2: Convert to fraction form
    13,280.68/18,339.78 = 8,321.32/x
  3. Step 3: Cross multiply
    13,280.68x = 18,339.78 × 8,321.32
  4. Step 4: Simplify right side
    13,280.68x = 152,611,178.11
  5. Step 5: Solve for x
    x = 152,611,178.11/13,280.68
  6. Step 6: Final answer
    x = 11,491.22

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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.