Home / 39,235.77-54,145.71-21,330.80

Finding the Fourth Proportional to 39,235.77, 54,145.71 and 21,330.80

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Solution

The fourth proportional to 39,235.77, 54,145.71 and 21,330.80 is: 29,436.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,235.77 : 54,145.71 = 21,330.80 : x
  2. Step 2: Convert to fraction form
    39,235.77/54,145.71 = 21,330.80/x
  3. Step 3: Cross multiply
    39,235.77x = 54,145.71 × 21,330.80
  4. Step 4: Simplify right side
    39,235.77x = 1,154,971,040.14
  5. Step 5: Solve for x
    x = 1,154,971,040.14/39,235.77
  6. Step 6: Final answer
    x = 29,436.69

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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.