Home / 13,918.40-20,834.40-12,363.20

Finding the Fourth Proportional to 13,918.40, 20,834.40 and 12,363.20

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Solution

The fourth proportional to 13,918.40, 20,834.40 and 12,363.20 is: 18,506.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,918.40 : 20,834.40 = 12,363.20 : x
  2. Step 2: Convert to fraction form
    13,918.40/20,834.40 = 12,363.20/x
  3. Step 3: Cross multiply
    13,918.40x = 20,834.40 × 12,363.20
  4. Step 4: Simplify right side
    13,918.40x = 257,579,854.08
  5. Step 5: Solve for x
    x = 257,579,854.08/13,918.40
  6. Step 6: Final answer
    x = 18,506.43

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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.