Home / 15,321.40-21,145.52-8,607.04

Finding the Fourth Proportional to 15,321.40, 21,145.52 and 8,607.04

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Solution

The fourth proportional to 15,321.40, 21,145.52 and 8,607.04 is: 11,878.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.40 : 21,145.52 = 8,607.04 : x
  2. Step 2: Convert to fraction form
    15,321.40/21,145.52 = 8,607.04/x
  3. Step 3: Cross multiply
    15,321.40x = 21,145.52 × 8,607.04
  4. Step 4: Simplify right side
    15,321.40x = 182,000,305.11
  5. Step 5: Solve for x
    x = 182,000,305.11/15,321.40
  6. Step 6: Final answer
    x = 11,878.83

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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.