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Finding the Fourth Proportional to 19,779.98, 29,659.32 and 7,927.80

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Solution

The fourth proportional to 19,779.98, 29,659.32 and 7,927.80 is: 11,887.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,779.98 : 29,659.32 = 7,927.80 : x
  2. Step 2: Convert to fraction form
    19,779.98/29,659.32 = 7,927.80/x
  3. Step 3: Cross multiply
    19,779.98x = 29,659.32 × 7,927.80
  4. Step 4: Simplify right side
    19,779.98x = 235,133,157.10
  5. Step 5: Solve for x
    x = 235,133,157.10/19,779.98
  6. Step 6: Final answer
    x = 11,887.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.