Home / 28,314.64-39,079-16,385.20

Finding the Fourth Proportional to 28,314.64, 39,079 and 16,385.20

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Solution

The fourth proportional to 28,314.64, 39,079 and 16,385.20 is: 22,614.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,314.64 : 39,079 = 16,385.20 : x
  2. Step 2: Convert to fraction form
    28,314.64/39,079 = 16,385.20/x
  3. Step 3: Cross multiply
    28,314.64x = 39,079 × 16,385.20
  4. Step 4: Simplify right side
    28,314.64x = 640,317,230.80
  5. Step 5: Solve for x
    x = 640,317,230.80/28,314.64
  6. Step 6: Final answer
    x = 22,614.35

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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.