Home / 20,520.18-28,318.10-11,567.69

Finding the Fourth Proportional to 20,520.18, 28,318.10 and 11,567.69

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Solution

The fourth proportional to 20,520.18, 28,318.10 and 11,567.69 is: 15,963.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.18 : 28,318.10 = 11,567.69 : x
  2. Step 2: Convert to fraction form
    20,520.18/28,318.10 = 11,567.69/x
  3. Step 3: Cross multiply
    20,520.18x = 28,318.10 × 11,567.69
  4. Step 4: Simplify right side
    20,520.18x = 327,574,802.76
  5. Step 5: Solve for x
    x = 327,574,802.76/20,520.18
  6. Step 6: Final answer
    x = 15,963.54

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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.