Home / 28,309.40-39,069.16-16,979.34

Finding the Fourth Proportional to 28,309.40, 39,069.16 and 16,979.34

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Solution

The fourth proportional to 28,309.40, 39,069.16 and 16,979.34 is: 23,432.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,309.40 : 39,069.16 = 16,979.34 : x
  2. Step 2: Convert to fraction form
    28,309.40/39,069.16 = 16,979.34/x
  3. Step 3: Cross multiply
    28,309.40x = 39,069.16 × 16,979.34
  4. Step 4: Simplify right side
    28,309.40x = 663,368,551.15
  5. Step 5: Solve for x
    x = 663,368,551.15/28,309.40
  6. Step 6: Final answer
    x = 23,432.80

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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.