Home / 20,779.02-31,182.20-7,631.51

Finding the Fourth Proportional to 20,779.02, 31,182.20 and 7,631.51

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Solution

The fourth proportional to 20,779.02, 31,182.20 and 7,631.51 is: 11,452.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.02 : 31,182.20 = 7,631.51 : x
  2. Step 2: Convert to fraction form
    20,779.02/31,182.20 = 7,631.51/x
  3. Step 3: Cross multiply
    20,779.02x = 31,182.20 × 7,631.51
  4. Step 4: Simplify right side
    20,779.02x = 237,967,134.29
  5. Step 5: Solve for x
    x = 237,967,134.29/20,779.02
  6. Step 6: Final answer
    x = 11,452.28

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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.