Home / 11,838.24-17,720.40-8,721.76

Finding the Fourth Proportional to 11,838.24, 17,720.40 and 8,721.76

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Solution

The fourth proportional to 11,838.24, 17,720.40 and 8,721.76 is: 13,055.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,838.24 : 17,720.40 = 8,721.76 : x
  2. Step 2: Convert to fraction form
    11,838.24/17,720.40 = 8,721.76/x
  3. Step 3: Cross multiply
    11,838.24x = 17,720.40 × 8,721.76
  4. Step 4: Simplify right side
    11,838.24x = 154,553,075.90
  5. Step 5: Solve for x
    x = 154,553,075.90/11,838.24
  6. Step 6: Final answer
    x = 13,055.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.