Home / 12,918.30-19,274.10-11,515.02

Finding the Fourth Proportional to 12,918.30, 19,274.10 and 11,515.02

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Solution

The fourth proportional to 12,918.30, 19,274.10 and 11,515.02 is: 17,180.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.30 : 19,274.10 = 11,515.02 : x
  2. Step 2: Convert to fraction form
    12,918.30/19,274.10 = 11,515.02/x
  3. Step 3: Cross multiply
    12,918.30x = 19,274.10 × 11,515.02
  4. Step 4: Simplify right side
    12,918.30x = 221,941,646.98
  5. Step 5: Solve for x
    x = 221,941,646.98/12,918.30
  6. Step 6: Final answer
    x = 17,180.41

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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.