Home / 19,789.08-29,701.80-12,406.72

Finding the Fourth Proportional to 19,789.08, 29,701.80 and 12,406.72

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Solution

The fourth proportional to 19,789.08, 29,701.80 and 12,406.72 is: 18,621.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,789.08 : 29,701.80 = 12,406.72 : x
  2. Step 2: Convert to fraction form
    19,789.08/29,701.80 = 12,406.72/x
  3. Step 3: Cross multiply
    19,789.08x = 29,701.80 × 12,406.72
  4. Step 4: Simplify right side
    19,789.08x = 368,501,916.10
  5. Step 5: Solve for x
    x = 368,501,916.10/19,789.08
  6. Step 6: Final answer
    x = 18,621.48

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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.