Home / 28,856.96-39,822.88-16,920.64

Finding the Fourth Proportional to 28,856.96, 39,822.88 and 16,920.64

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Solution

The fourth proportional to 28,856.96, 39,822.88 and 16,920.64 is: 23,350.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,856.96 : 39,822.88 = 16,920.64 : x
  2. Step 2: Convert to fraction form
    28,856.96/39,822.88 = 16,920.64/x
  3. Step 3: Cross multiply
    28,856.96x = 39,822.88 × 16,920.64
  4. Step 4: Simplify right side
    28,856.96x = 673,828,616.24
  5. Step 5: Solve for x
    x = 673,828,616.24/28,856.96
  6. Step 6: Final answer
    x = 23,350.64

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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.