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Finding the Fourth Proportional to 10,893.12, 15,033.96 and 7,918.80

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Solution

The fourth proportional to 10,893.12, 15,033.96 and 7,918.80 is: 10,929.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,893.12 : 15,033.96 = 7,918.80 : x
  2. Step 2: Convert to fraction form
    10,893.12/15,033.96 = 7,918.80/x
  3. Step 3: Cross multiply
    10,893.12x = 15,033.96 × 7,918.80
  4. Step 4: Simplify right side
    10,893.12x = 119,050,922.45
  5. Step 5: Solve for x
    x = 119,050,922.45/10,893.12
  6. Step 6: Final answer
    x = 10,929.00

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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.