Home / 29,120.36-40,132.80-21,148.74

Finding the Fourth Proportional to 29,120.36, 40,132.80 and 21,148.74

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Solution

The fourth proportional to 29,120.36, 40,132.80 and 21,148.74 is: 29,146.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,120.36 : 40,132.80 = 21,148.74 : x
  2. Step 2: Convert to fraction form
    29,120.36/40,132.80 = 21,148.74/x
  3. Step 3: Cross multiply
    29,120.36x = 40,132.80 × 21,148.74
  4. Step 4: Simplify right side
    29,120.36x = 848,758,152.67
  5. Step 5: Solve for x
    x = 848,758,152.67/29,120.36
  6. Step 6: Final answer
    x = 29,146.56

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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.