Home / 20,952.81-28,915.52-11,521.71

Finding the Fourth Proportional to 20,952.81, 28,915.52 and 11,521.71

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Solution

The fourth proportional to 20,952.81, 28,915.52 and 11,521.71 is: 15,900.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952.81 : 28,915.52 = 11,521.71 : x
  2. Step 2: Convert to fraction form
    20,952.81/28,915.52 = 11,521.71/x
  3. Step 3: Cross multiply
    20,952.81x = 28,915.52 × 11,521.71
  4. Step 4: Simplify right side
    20,952.81x = 333,156,178.33
  5. Step 5: Solve for x
    x = 333,156,178.33/20,952.81
  6. Step 6: Final answer
    x = 15,900.31

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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.