Home / 21,311.32-31,967.08-6,520.18

Finding the Fourth Proportional to 21,311.32, 31,967.08 and 6,520.18

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Solution

The fourth proportional to 21,311.32, 31,967.08 and 6,520.18 is: 9,780.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.32 : 31,967.08 = 6,520.18 : x
  2. Step 2: Convert to fraction form
    21,311.32/31,967.08 = 6,520.18/x
  3. Step 3: Cross multiply
    21,311.32x = 31,967.08 × 6,520.18
  4. Step 4: Simplify right side
    21,311.32x = 208,431,115.67
  5. Step 5: Solve for x
    x = 208,431,115.67/21,311.32
  6. Step 6: Final answer
    x = 9,780.30

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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.