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Finding the Fourth Proportional to 28,615.13, 42,914.49 and 9,890.27

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Solution

The fourth proportional to 28,615.13, 42,914.49 and 9,890.27 is: 14,832.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.13 : 42,914.49 = 9,890.27 : x
  2. Step 2: Convert to fraction form
    28,615.13/42,914.49 = 9,890.27/x
  3. Step 3: Cross multiply
    28,615.13x = 42,914.49 × 9,890.27
  4. Step 4: Simplify right side
    28,615.13x = 424,435,893.01
  5. Step 5: Solve for x
    x = 424,435,893.01/28,615.13
  6. Step 6: Final answer
    x = 14,832.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.