Home / 20,387.04-30,654.48-18,762.88

Finding the Fourth Proportional to 20,387.04, 30,654.48 and 18,762.88

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Solution

The fourth proportional to 20,387.04, 30,654.48 and 18,762.88 is: 28,212.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.04 : 30,654.48 = 18,762.88 : x
  2. Step 2: Convert to fraction form
    20,387.04/30,654.48 = 18,762.88/x
  3. Step 3: Cross multiply
    20,387.04x = 30,654.48 × 18,762.88
  4. Step 4: Simplify right side
    20,387.04x = 575,166,329.70
  5. Step 5: Solve for x
    x = 575,166,329.70/20,387.04
  6. Step 6: Final answer
    x = 28,212.35

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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.