Home / 28,407.81-39,201-15,660.33

Finding the Fourth Proportional to 28,407.81, 39,201 and 15,660.33

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Solution

The fourth proportional to 28,407.81, 39,201 and 15,660.33 is: 21,610.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,407.81 : 39,201 = 15,660.33 : x
  2. Step 2: Convert to fraction form
    28,407.81/39,201 = 15,660.33/x
  3. Step 3: Cross multiply
    28,407.81x = 39,201 × 15,660.33
  4. Step 4: Simplify right side
    28,407.81x = 613,900,596.33
  5. Step 5: Solve for x
    x = 613,900,596.33/28,407.81
  6. Step 6: Final answer
    x = 21,610.28

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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.