Home / 20,779.90-31,246.65-17,400.70

Finding the Fourth Proportional to 20,779.90, 31,246.65 and 17,400.70

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Solution

The fourth proportional to 20,779.90, 31,246.65 and 17,400.70 is: 26,165.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.90 : 31,246.65 = 17,400.70 : x
  2. Step 2: Convert to fraction form
    20,779.90/31,246.65 = 17,400.70/x
  3. Step 3: Cross multiply
    20,779.90x = 31,246.65 × 17,400.70
  4. Step 4: Simplify right side
    20,779.90x = 543,713,582.66
  5. Step 5: Solve for x
    x = 543,713,582.66/20,779.90
  6. Step 6: Final answer
    x = 26,165.36

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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.