Home / 28,476.81-39,299.11-15,730.65

Finding the Fourth Proportional to 28,476.81, 39,299.11 and 15,730.65

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Solution

The fourth proportional to 28,476.81, 39,299.11 and 15,730.65 is: 21,708.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,476.81 : 39,299.11 = 15,730.65 : x
  2. Step 2: Convert to fraction form
    28,476.81/39,299.11 = 15,730.65/x
  3. Step 3: Cross multiply
    28,476.81x = 39,299.11 × 15,730.65
  4. Step 4: Simplify right side
    28,476.81x = 618,200,505.39
  5. Step 5: Solve for x
    x = 618,200,505.39/28,476.81
  6. Step 6: Final answer
    x = 21,708.91

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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.