Home / 28,780.65-39,710.39-16,205.40

Finding the Fourth Proportional to 28,780.65, 39,710.39 and 16,205.40

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Solution

The fourth proportional to 28,780.65, 39,710.39 and 16,205.40 is: 22,359.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,780.65 : 39,710.39 = 16,205.40 : x
  2. Step 2: Convert to fraction form
    28,780.65/39,710.39 = 16,205.40/x
  3. Step 3: Cross multiply
    28,780.65x = 39,710.39 × 16,205.40
  4. Step 4: Simplify right side
    28,780.65x = 643,522,673.08
  5. Step 5: Solve for x
    x = 643,522,673.08/28,780.65
  6. Step 6: Final answer
    x = 22,359.56

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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.