Home / 20,878.57-28,792.86-16,643.68

Finding the Fourth Proportional to 20,878.57, 28,792.86 and 16,643.68

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Solution

The fourth proportional to 20,878.57, 28,792.86 and 16,643.68 is: 22,952.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.57 : 28,792.86 = 16,643.68 : x
  2. Step 2: Convert to fraction form
    20,878.57/28,792.86 = 16,643.68/x
  3. Step 3: Cross multiply
    20,878.57x = 28,792.86 × 16,643.68
  4. Step 4: Simplify right side
    20,878.57x = 479,219,004.16
  5. Step 5: Solve for x
    x = 479,219,004.16/20,878.57
  6. Step 6: Final answer
    x = 22,952.68

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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.