Home / 12,918.49-17,829.99-8,386.85

Finding the Fourth Proportional to 12,918.49, 17,829.99 and 8,386.85

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Solution

The fourth proportional to 12,918.49, 17,829.99 and 8,386.85 is: 11,575.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.49 : 17,829.99 = 8,386.85 : x
  2. Step 2: Convert to fraction form
    12,918.49/17,829.99 = 8,386.85/x
  3. Step 3: Cross multiply
    12,918.49x = 17,829.99 × 8,386.85
  4. Step 4: Simplify right side
    12,918.49x = 149,537,395.91
  5. Step 5: Solve for x
    x = 149,537,395.91/12,918.49
  6. Step 6: Final answer
    x = 11,575.45

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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.