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Finding the Fourth Proportional to 13,008.60, 19,515.60 and 7,457.40

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Solution

The fourth proportional to 13,008.60, 19,515.60 and 7,457.40 is: 11,187.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,008.60 : 19,515.60 = 7,457.40 : x
  2. Step 2: Convert to fraction form
    13,008.60/19,515.60 = 7,457.40/x
  3. Step 3: Cross multiply
    13,008.60x = 19,515.60 × 7,457.40
  4. Step 4: Simplify right side
    13,008.60x = 145,535,635.44
  5. Step 5: Solve for x
    x = 145,535,635.44/13,008.60
  6. Step 6: Final answer
    x = 11,187.65

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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.