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Finding the Fourth Proportional to 10,005.30, 14,986.35 and 8,910.90

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Solution

The fourth proportional to 10,005.30, 14,986.35 and 8,910.90 is: 13,347.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,005.30 : 14,986.35 = 8,910.90 : x
  2. Step 2: Convert to fraction form
    10,005.30/14,986.35 = 8,910.90/x
  3. Step 3: Cross multiply
    10,005.30x = 14,986.35 × 8,910.90
  4. Step 4: Simplify right side
    10,005.30x = 133,541,866.22
  5. Step 5: Solve for x
    x = 133,541,866.22/10,005.30
  6. Step 6: Final answer
    x = 13,347.11

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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.