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Finding the Fourth Proportional to 28,867.42, 39,828 and 16,931.26

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Solution

The fourth proportional to 28,867.42, 39,828 and 16,931.26 is: 23,359.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,867.42 : 39,828 = 16,931.26 : x
  2. Step 2: Convert to fraction form
    28,867.42/39,828 = 16,931.26/x
  3. Step 3: Cross multiply
    28,867.42x = 39,828 × 16,931.26
  4. Step 4: Simplify right side
    28,867.42x = 674,338,223.28
  5. Step 5: Solve for x
    x = 674,338,223.28/28,867.42
  6. Step 6: Final answer
    x = 23,359.84

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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.