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Finding the Fourth Proportional to 13,216.59, 19,818.61 and 7,671.65

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Solution

The fourth proportional to 13,216.59, 19,818.61 and 7,671.65 is: 11,503.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,216.59 : 19,818.61 = 7,671.65 : x
  2. Step 2: Convert to fraction form
    13,216.59/19,818.61 = 7,671.65/x
  3. Step 3: Cross multiply
    13,216.59x = 19,818.61 × 7,671.65
  4. Step 4: Simplify right side
    13,216.59x = 152,041,321.13
  5. Step 5: Solve for x
    x = 152,041,321.13/13,216.59
  6. Step 6: Final answer
    x = 11,503.82

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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.