Home / 20,779.97-31,114.53-10,898.51

Finding the Fourth Proportional to 20,779.97, 31,114.53 and 10,898.51

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Solution

The fourth proportional to 20,779.97, 31,114.53 and 10,898.51 is: 16,318.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.97 : 31,114.53 = 10,898.51 : x
  2. Step 2: Convert to fraction form
    20,779.97/31,114.53 = 10,898.51/x
  3. Step 3: Cross multiply
    20,779.97x = 31,114.53 × 10,898.51
  4. Step 4: Simplify right side
    20,779.97x = 339,101,860.78
  5. Step 5: Solve for x
    x = 339,101,860.78/20,779.97
  6. Step 6: Final answer
    x = 16,318.69

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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.