Home / 28,409.51-39,205.40-15,663.20

Finding the Fourth Proportional to 28,409.51, 39,205.40 and 15,663.20

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Solution

The fourth proportional to 28,409.51, 39,205.40 and 15,663.20 is: 21,615.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.51 : 39,205.40 = 15,663.20 : x
  2. Step 2: Convert to fraction form
    28,409.51/39,205.40 = 15,663.20/x
  3. Step 3: Cross multiply
    28,409.51x = 39,205.40 × 15,663.20
  4. Step 4: Simplify right side
    28,409.51x = 614,081,942.96
  5. Step 5: Solve for x
    x = 614,081,942.96/28,409.51
  6. Step 6: Final answer
    x = 21,615.37

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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.