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Finding the Fourth Proportional to 28,991.86, 43,485.05 and 9,265.12

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Solution

The fourth proportional to 28,991.86, 43,485.05 and 9,265.12 is: 13,896.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,991.86 : 43,485.05 = 9,265.12 : x
  2. Step 2: Convert to fraction form
    28,991.86/43,485.05 = 9,265.12/x
  3. Step 3: Cross multiply
    28,991.86x = 43,485.05 × 9,265.12
  4. Step 4: Simplify right side
    28,991.86x = 402,894,206.46
  5. Step 5: Solve for x
    x = 402,894,206.46/28,991.86
  6. Step 6: Final answer
    x = 13,896.80

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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.