Home / 21,405.18-32,112.90-9,715.80

Finding the Fourth Proportional to 21,405.18, 32,112.90 and 9,715.80

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Solution

The fourth proportional to 21,405.18, 32,112.90 and 9,715.80 is: 14,576.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.18 : 32,112.90 = 9,715.80 : x
  2. Step 2: Convert to fraction form
    21,405.18/32,112.90 = 9,715.80/x
  3. Step 3: Cross multiply
    21,405.18x = 32,112.90 × 9,715.80
  4. Step 4: Simplify right side
    21,405.18x = 312,002,513.82
  5. Step 5: Solve for x
    x = 312,002,513.82/21,405.18
  6. Step 6: Final answer
    x = 14,576.03

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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.