Home / 13,039.80-17,985.36-8,561.92

Finding the Fourth Proportional to 13,039.80, 17,985.36 and 8,561.92

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Solution

The fourth proportional to 13,039.80, 17,985.36 and 8,561.92 is: 11,809.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,039.80 : 17,985.36 = 8,561.92 : x
  2. Step 2: Convert to fraction form
    13,039.80/17,985.36 = 8,561.92/x
  3. Step 3: Cross multiply
    13,039.80x = 17,985.36 × 8,561.92
  4. Step 4: Simplify right side
    13,039.80x = 153,989,213.49
  5. Step 5: Solve for x
    x = 153,989,213.49/13,039.80
  6. Step 6: Final answer
    x = 11,809.17

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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.