Home / 20,686.32-31,032.40-6,643.04

Finding the Fourth Proportional to 20,686.32, 31,032.40 and 6,643.04

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Solution

The fourth proportional to 20,686.32, 31,032.40 and 6,643.04 is: 9,965.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.32 : 31,032.40 = 6,643.04 : x
  2. Step 2: Convert to fraction form
    20,686.32/31,032.40 = 6,643.04/x
  3. Step 3: Cross multiply
    20,686.32x = 31,032.40 × 6,643.04
  4. Step 4: Simplify right side
    20,686.32x = 206,149,474.50
  5. Step 5: Solve for x
    x = 206,149,474.50/20,686.32
  6. Step 6: Final answer
    x = 9,965.50

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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.