Home / 21,140.87-31,714.90-7,286.63

Finding the Fourth Proportional to 21,140.87, 31,714.90 and 7,286.63

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Solution

The fourth proportional to 21,140.87, 31,714.90 and 7,286.63 is: 10,931.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.87 : 31,714.90 = 7,286.63 : x
  2. Step 2: Convert to fraction form
    21,140.87/31,714.90 = 7,286.63/x
  3. Step 3: Cross multiply
    21,140.87x = 31,714.90 × 7,286.63
  4. Step 4: Simplify right side
    21,140.87x = 231,094,565.00
  5. Step 5: Solve for x
    x = 231,094,565.00/21,140.87
  6. Step 6: Final answer
    x = 10,931.18

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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.