Home / 38,712.80-58,128.60-21,216.80

Finding the Fourth Proportional to 38,712.80, 58,128.60 and 21,216.80

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Solution

The fourth proportional to 38,712.80, 58,128.60 and 21,216.80 is: 31,857.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,712.80 : 58,128.60 = 21,216.80 : x
  2. Step 2: Convert to fraction form
    38,712.80/58,128.60 = 21,216.80/x
  3. Step 3: Cross multiply
    38,712.80x = 58,128.60 × 21,216.80
  4. Step 4: Simplify right side
    38,712.80x = 1,233,302,880.48
  5. Step 5: Solve for x
    x = 1,233,302,880.48/38,712.80
  6. Step 6: Final answer
    x = 31,857.75

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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.