Home / 20,504.55-30,740.40-18,864.30

Finding the Fourth Proportional to 20,504.55, 30,740.40 and 18,864.30

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Solution

The fourth proportional to 20,504.55, 30,740.40 and 18,864.30 is: 28,281.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,504.55 : 30,740.40 = 18,864.30 : x
  2. Step 2: Convert to fraction form
    20,504.55/30,740.40 = 18,864.30/x
  3. Step 3: Cross multiply
    20,504.55x = 30,740.40 × 18,864.30
  4. Step 4: Simplify right side
    20,504.55x = 579,896,127.72
  5. Step 5: Solve for x
    x = 579,896,127.72/20,504.55
  6. Step 6: Final answer
    x = 28,281.34

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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.