Home / 20,527.20-28,329.14-11,455.40

Finding the Fourth Proportional to 20,527.20, 28,329.14 and 11,455.40

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Solution

The fourth proportional to 20,527.20, 28,329.14 and 11,455.40 is: 15,809.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,527.20 : 28,329.14 = 11,455.40 : x
  2. Step 2: Convert to fraction form
    20,527.20/28,329.14 = 11,455.40/x
  3. Step 3: Cross multiply
    20,527.20x = 28,329.14 × 11,455.40
  4. Step 4: Simplify right side
    20,527.20x = 324,521,630.36
  5. Step 5: Solve for x
    x = 324,521,630.36/20,527.20
  6. Step 6: Final answer
    x = 15,809.35

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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.