Home / 28,434.72-39,218.76-20,878.68

Finding the Fourth Proportional to 28,434.72, 39,218.76 and 20,878.68

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Solution

The fourth proportional to 28,434.72, 39,218.76 and 20,878.68 is: 28,797.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,434.72 : 39,218.76 = 20,878.68 : x
  2. Step 2: Convert to fraction form
    28,434.72/39,218.76 = 20,878.68/x
  3. Step 3: Cross multiply
    28,434.72x = 39,218.76 × 20,878.68
  4. Step 4: Simplify right side
    28,434.72x = 818,835,940.04
  5. Step 5: Solve for x
    x = 818,835,940.04/28,434.72
  6. Step 6: Final answer
    x = 28,797.05

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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.