Home / 19,779.45-29,676.93-8,678.40

Finding the Fourth Proportional to 19,779.45, 29,676.93 and 8,678.40

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Solution

The fourth proportional to 19,779.45, 29,676.93 and 8,678.40 is: 13,021.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,779.45 : 29,676.93 = 8,678.40 : x
  2. Step 2: Convert to fraction form
    19,779.45/29,676.93 = 8,678.40/x
  3. Step 3: Cross multiply
    19,779.45x = 29,676.93 × 8,678.40
  4. Step 4: Simplify right side
    19,779.45x = 257,548,269.31
  5. Step 5: Solve for x
    x = 257,548,269.31/19,779.45
  6. Step 6: Final answer
    x = 13,021.00

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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.