Home / 28,476.64-39,299.52-15,729.76

Finding the Fourth Proportional to 28,476.64, 39,299.52 and 15,729.76

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Solution

The fourth proportional to 28,476.64, 39,299.52 and 15,729.76 is: 21,708.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,476.64 : 39,299.52 = 15,729.76 : x
  2. Step 2: Convert to fraction form
    28,476.64/39,299.52 = 15,729.76/x
  3. Step 3: Cross multiply
    28,476.64x = 39,299.52 × 15,729.76
  4. Step 4: Simplify right side
    28,476.64x = 618,172,017.72
  5. Step 5: Solve for x
    x = 618,172,017.72/28,476.64
  6. Step 6: Final answer
    x = 21,708.04

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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.