Home / 13,880.26-20,700.19-12,318.58

Finding the Fourth Proportional to 13,880.26, 20,700.19 and 12,318.58

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Solution

The fourth proportional to 13,880.26, 20,700.19 and 12,318.58 is: 18,371.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,880.26 : 20,700.19 = 12,318.58 : x
  2. Step 2: Convert to fraction form
    13,880.26/20,700.19 = 12,318.58/x
  3. Step 3: Cross multiply
    13,880.26x = 20,700.19 × 12,318.58
  4. Step 4: Simplify right side
    13,880.26x = 254,996,946.53
  5. Step 5: Solve for x
    x = 254,996,946.53/13,880.26
  6. Step 6: Final answer
    x = 18,371.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.