Home / 31,003.36-42,712.32-21,555.52

Finding the Fourth Proportional to 31,003.36, 42,712.32 and 21,555.52

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Solution

The fourth proportional to 31,003.36, 42,712.32 and 21,555.52 is: 29,696.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,003.36 : 42,712.32 = 21,555.52 : x
  2. Step 2: Convert to fraction form
    31,003.36/42,712.32 = 21,555.52/x
  3. Step 3: Cross multiply
    31,003.36x = 42,712.32 × 21,555.52
  4. Step 4: Simplify right side
    31,003.36x = 920,686,268.01
  5. Step 5: Solve for x
    x = 920,686,268.01/31,003.36
  6. Step 6: Final answer
    x = 29,696.34

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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.