Home / 15,704.07-21,671.55-8,989.81

Finding the Fourth Proportional to 15,704.07, 21,671.55 and 8,989.81

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Solution

The fourth proportional to 15,704.07, 21,671.55 and 8,989.81 is: 12,405.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,704.07 : 21,671.55 = 8,989.81 : x
  2. Step 2: Convert to fraction form
    15,704.07/21,671.55 = 8,989.81/x
  3. Step 3: Cross multiply
    15,704.07x = 21,671.55 × 8,989.81
  4. Step 4: Simplify right side
    15,704.07x = 194,823,116.91
  5. Step 5: Solve for x
    x = 194,823,116.91/15,704.07
  6. Step 6: Final answer
    x = 12,405.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.