Home / 21,080.32-31,631.42-9,390.81

Finding the Fourth Proportional to 21,080.32, 31,631.42 and 9,390.81

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Solution

The fourth proportional to 21,080.32, 31,631.42 and 9,390.81 is: 14,091.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.32 : 31,631.42 = 9,390.81 : x
  2. Step 2: Convert to fraction form
    21,080.32/31,631.42 = 9,390.81/x
  3. Step 3: Cross multiply
    21,080.32x = 31,631.42 × 9,390.81
  4. Step 4: Simplify right side
    21,080.32x = 297,044,655.25
  5. Step 5: Solve for x
    x = 297,044,655.25/21,080.32
  6. Step 6: Final answer
    x = 14,091.09

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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.