Home / 20,779.10-31,158.56-9,683.18

Finding the Fourth Proportional to 20,779.10, 31,158.56 and 9,683.18

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Solution

The fourth proportional to 20,779.10, 31,158.56 and 9,683.18 is: 14,520.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.10 : 31,158.56 = 9,683.18 : x
  2. Step 2: Convert to fraction form
    20,779.10/31,158.56 = 9,683.18/x
  3. Step 3: Cross multiply
    20,779.10x = 31,158.56 × 9,683.18
  4. Step 4: Simplify right side
    20,779.10x = 301,713,945.02
  5. Step 5: Solve for x
    x = 301,713,945.02/20,779.10
  6. Step 6: Final answer
    x = 14,520.07

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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.