Home / 20,835.96-31,255.40-7,689.24

Finding the Fourth Proportional to 20,835.96, 31,255.40 and 7,689.24

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Solution

The fourth proportional to 20,835.96, 31,255.40 and 7,689.24 is: 11,534.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.96 : 31,255.40 = 7,689.24 : x
  2. Step 2: Convert to fraction form
    20,835.96/31,255.40 = 7,689.24/x
  3. Step 3: Cross multiply
    20,835.96x = 31,255.40 × 7,689.24
  4. Step 4: Simplify right side
    20,835.96x = 240,330,271.90
  5. Step 5: Solve for x
    x = 240,330,271.90/20,835.96
  6. Step 6: Final answer
    x = 11,534.40

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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.