Home / 20,576.64-30,666.96-20,405.04

Finding the Fourth Proportional to 20,576.64, 30,666.96 and 20,405.04

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Solution

The fourth proportional to 20,576.64, 30,666.96 and 20,405.04 is: 30,411.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,576.64 : 30,666.96 = 20,405.04 : x
  2. Step 2: Convert to fraction form
    20,576.64/30,666.96 = 20,405.04/x
  3. Step 3: Cross multiply
    20,576.64x = 30,666.96 × 20,405.04
  4. Step 4: Simplify right side
    20,576.64x = 625,760,545.48
  5. Step 5: Solve for x
    x = 625,760,545.48/20,576.64
  6. Step 6: Final answer
    x = 30,411.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.