Home / 15,510.96-21,405.60-8,436.96

Finding the Fourth Proportional to 15,510.96, 21,405.60 and 8,436.96

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Solution

The fourth proportional to 15,510.96, 21,405.60 and 8,436.96 is: 11,643.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,510.96 : 21,405.60 = 8,436.96 : x
  2. Step 2: Convert to fraction form
    15,510.96/21,405.60 = 8,436.96/x
  3. Step 3: Cross multiply
    15,510.96x = 21,405.60 × 8,436.96
  4. Step 4: Simplify right side
    15,510.96x = 180,598,190.98
  5. Step 5: Solve for x
    x = 180,598,190.98/15,510.96
  6. Step 6: Final answer
    x = 11,643.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.