Home / 13,604.85-18,776.88-12,715.47

Finding the Fourth Proportional to 13,604.85, 18,776.88 and 12,715.47

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Solution

The fourth proportional to 13,604.85, 18,776.88 and 12,715.47 is: 17,549.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,604.85 : 18,776.88 = 12,715.47 : x
  2. Step 2: Convert to fraction form
    13,604.85/18,776.88 = 12,715.47/x
  3. Step 3: Cross multiply
    13,604.85x = 18,776.88 × 12,715.47
  4. Step 4: Simplify right side
    13,604.85x = 238,756,854.33
  5. Step 5: Solve for x
    x = 238,756,854.33/13,604.85
  6. Step 6: Final answer
    x = 17,549.39

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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.