Home / 20,521.86-28,320.42-11,567.58

Finding the Fourth Proportional to 20,521.86, 28,320.42 and 11,567.58

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Solution

The fourth proportional to 20,521.86, 28,320.42 and 11,567.58 is: 15,963.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.86 : 28,320.42 = 11,567.58 : x
  2. Step 2: Convert to fraction form
    20,521.86/28,320.42 = 11,567.58/x
  3. Step 3: Cross multiply
    20,521.86x = 28,320.42 × 11,567.58
  4. Step 4: Simplify right side
    20,521.86x = 327,598,723.98
  5. Step 5: Solve for x
    x = 327,598,723.98/20,521.86
  6. Step 6: Final answer
    x = 15,963.40

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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.