Home / 28,409.75-39,205.73-15,663.40

Finding the Fourth Proportional to 28,409.75, 39,205.73 and 15,663.40

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Solution

The fourth proportional to 28,409.75, 39,205.73 and 15,663.40 is: 21,615.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.75 : 39,205.73 = 15,663.40 : x
  2. Step 2: Convert to fraction form
    28,409.75/39,205.73 = 15,663.40/x
  3. Step 3: Cross multiply
    28,409.75x = 39,205.73 × 15,663.40
  4. Step 4: Simplify right side
    28,409.75x = 614,095,031.28
  5. Step 5: Solve for x
    x = 614,095,031.28/28,409.75
  6. Step 6: Final answer
    x = 21,615.64

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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.