Home / 20,287.04-28,023.68-15,289.28

Finding the Fourth Proportional to 20,287.04, 28,023.68 and 15,289.28

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Solution

The fourth proportional to 20,287.04, 28,023.68 and 15,289.28 is: 21,119.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.04 : 28,023.68 = 15,289.28 : x
  2. Step 2: Convert to fraction form
    20,287.04/28,023.68 = 15,289.28/x
  3. Step 3: Cross multiply
    20,287.04x = 28,023.68 × 15,289.28
  4. Step 4: Simplify right side
    20,287.04x = 428,461,890.15
  5. Step 5: Solve for x
    x = 428,461,890.15/20,287.04
  6. Step 6: Final answer
    x = 21,119.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.