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Finding the Fourth Proportional to 9,991.30, 14,986.95 and 3,417.70

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Solution

The fourth proportional to 9,991.30, 14,986.95 and 3,417.70 is: 5,126.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.30 : 14,986.95 = 3,417.70 : x
  2. Step 2: Convert to fraction form
    9,991.30/14,986.95 = 3,417.70/x
  3. Step 3: Cross multiply
    9,991.30x = 14,986.95 × 3,417.70
  4. Step 4: Simplify right side
    9,991.30x = 51,220,899.02
  5. Step 5: Solve for x
    x = 51,220,899.02/9,991.30
  6. Step 6: Final answer
    x = 5,126.55

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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.