Home / 20,776.72-28,702.20-17,977.36

Finding the Fourth Proportional to 20,776.72, 28,702.20 and 17,977.36

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Solution

The fourth proportional to 20,776.72, 28,702.20 and 17,977.36 is: 24,835.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.72 : 28,702.20 = 17,977.36 : x
  2. Step 2: Convert to fraction form
    20,776.72/28,702.20 = 17,977.36/x
  3. Step 3: Cross multiply
    20,776.72x = 28,702.20 × 17,977.36
  4. Step 4: Simplify right side
    20,776.72x = 515,989,782.19
  5. Step 5: Solve for x
    x = 515,989,782.19/20,776.72
  6. Step 6: Final answer
    x = 24,835.00

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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.