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Finding the Fourth Proportional to 9,042.90, 13,564.35 and 7,890.90

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Solution

The fourth proportional to 9,042.90, 13,564.35 and 7,890.90 is: 11,836.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,042.90 : 13,564.35 = 7,890.90 : x
  2. Step 2: Convert to fraction form
    9,042.90/13,564.35 = 7,890.90/x
  3. Step 3: Cross multiply
    9,042.90x = 13,564.35 × 7,890.90
  4. Step 4: Simplify right side
    9,042.90x = 107,034,929.42
  5. Step 5: Solve for x
    x = 107,034,929.42/9,042.90
  6. Step 6: Final answer
    x = 11,836.35

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Similar ratio
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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.