Home / 20,767.36-31,113.60-11,397.28

Finding the Fourth Proportional to 20,767.36, 31,113.60 and 11,397.28

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Solution

The fourth proportional to 20,767.36, 31,113.60 and 11,397.28 is: 17,075.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,767.36 : 31,113.60 = 11,397.28 : x
  2. Step 2: Convert to fraction form
    20,767.36/31,113.60 = 11,397.28/x
  3. Step 3: Cross multiply
    20,767.36x = 31,113.60 × 11,397.28
  4. Step 4: Simplify right side
    20,767.36x = 354,610,411.01
  5. Step 5: Solve for x
    x = 354,610,411.01/20,767.36
  6. Step 6: Final answer
    x = 17,075.37

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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.