Home / 28,779.65-43,175.31-12,139.74

Finding the Fourth Proportional to 28,779.65, 43,175.31 and 12,139.74

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Solution

The fourth proportional to 28,779.65, 43,175.31 and 12,139.74 is: 18,212.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,779.65 : 43,175.31 = 12,139.74 : x
  2. Step 2: Convert to fraction form
    28,779.65/43,175.31 = 12,139.74/x
  3. Step 3: Cross multiply
    28,779.65x = 43,175.31 × 12,139.74
  4. Step 4: Simplify right side
    28,779.65x = 524,136,821.94
  5. Step 5: Solve for x
    x = 524,136,821.94/28,779.65
  6. Step 6: Final answer
    x = 18,212.06

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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.