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Finding the Fourth Proportional to 20,999.94, 28,977.84 and 17,030.76

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Solution

The fourth proportional to 20,999.94, 28,977.84 and 17,030.76 is: 23,500.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.94 : 28,977.84 = 17,030.76 : x
  2. Step 2: Convert to fraction form
    20,999.94/28,977.84 = 17,030.76/x
  3. Step 3: Cross multiply
    20,999.94x = 28,977.84 × 17,030.76
  4. Step 4: Simplify right side
    20,999.94x = 493,514,638.36
  5. Step 5: Solve for x
    x = 493,514,638.36/20,999.94
  6. Step 6: Final answer
    x = 23,500.76

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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.