Home / 19,779.12-29,680.63-10,426.05

Finding the Fourth Proportional to 19,779.12, 29,680.63 and 10,426.05

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Solution

The fourth proportional to 19,779.12, 29,680.63 and 10,426.05 is: 15,645.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,779.12 : 29,680.63 = 10,426.05 : x
  2. Step 2: Convert to fraction form
    19,779.12/29,680.63 = 10,426.05/x
  3. Step 3: Cross multiply
    19,779.12x = 29,680.63 × 10,426.05
  4. Step 4: Simplify right side
    19,779.12x = 309,451,706.35
  5. Step 5: Solve for x
    x = 309,451,706.35/19,779.12
  6. Step 6: Final answer
    x = 15,645.37

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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.