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Finding the Fourth Proportional to 28,835.90, 39,782.90 and 16,894.88

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Solution

The fourth proportional to 28,835.90, 39,782.90 and 16,894.88 is: 23,308.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,835.90 : 39,782.90 = 16,894.88 : x
  2. Step 2: Convert to fraction form
    28,835.90/39,782.90 = 16,894.88/x
  3. Step 3: Cross multiply
    28,835.90x = 39,782.90 × 16,894.88
  4. Step 4: Simplify right side
    28,835.90x = 672,127,219.03
  5. Step 5: Solve for x
    x = 672,127,219.03/28,835.90
  6. Step 6: Final answer
    x = 23,308.70

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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.