Home / 20,973.18-31,461.06-7,821.12

Finding the Fourth Proportional to 20,973.18, 31,461.06 and 7,821.12

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Solution

The fourth proportional to 20,973.18, 31,461.06 and 7,821.12 is: 11,732.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.18 : 31,461.06 = 7,821.12 : x
  2. Step 2: Convert to fraction form
    20,973.18/31,461.06 = 7,821.12/x
  3. Step 3: Cross multiply
    20,973.18x = 31,461.06 × 7,821.12
  4. Step 4: Simplify right side
    20,973.18x = 246,060,725.59
  5. Step 5: Solve for x
    x = 246,060,725.59/20,973.18
  6. Step 6: Final answer
    x = 11,732.16

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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.