Home / 13,060.80-17,999.28-12,866.40

Finding the Fourth Proportional to 13,060.80, 17,999.28 and 12,866.40

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Solution

The fourth proportional to 13,060.80, 17,999.28 and 12,866.40 is: 17,731.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,060.80 : 17,999.28 = 12,866.40 : x
  2. Step 2: Convert to fraction form
    13,060.80/17,999.28 = 12,866.40/x
  3. Step 3: Cross multiply
    13,060.80x = 17,999.28 × 12,866.40
  4. Step 4: Simplify right side
    13,060.80x = 231,585,936.19
  5. Step 5: Solve for x
    x = 231,585,936.19/13,060.80
  6. Step 6: Final answer
    x = 17,731.37

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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.