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Finding the Fourth Proportional to 9,140.60, 13,710.90 and 2,215.10

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Solution

The fourth proportional to 9,140.60, 13,710.90 and 2,215.10 is: 3,322.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,140.60 : 13,710.90 = 2,215.10 : x
  2. Step 2: Convert to fraction form
    9,140.60/13,710.90 = 2,215.10/x
  3. Step 3: Cross multiply
    9,140.60x = 13,710.90 × 2,215.10
  4. Step 4: Simplify right side
    9,140.60x = 30,371,014.59
  5. Step 5: Solve for x
    x = 30,371,014.59/9,140.60
  6. Step 6: Final answer
    x = 3,322.65

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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.