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Finding the Fourth Proportional to 28,485.72, 39,287.88 and 26,575.88

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Solution

The fourth proportional to 28,485.72, 39,287.88 and 26,575.88 is: 36,653.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.72 : 39,287.88 = 26,575.88 : x
  2. Step 2: Convert to fraction form
    28,485.72/39,287.88 = 26,575.88/x
  3. Step 3: Cross multiply
    28,485.72x = 39,287.88 × 26,575.88
  4. Step 4: Simplify right side
    28,485.72x = 1,044,109,787.90
  5. Step 5: Solve for x
    x = 1,044,109,787.90/28,485.72
  6. Step 6: Final answer
    x = 36,653.80

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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.