Home / 21,405.10-32,107.65-11,563.60

Finding the Fourth Proportional to 21,405.10, 32,107.65 and 11,563.60

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Solution

The fourth proportional to 21,405.10, 32,107.65 and 11,563.60 is: 17,345.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.10 : 32,107.65 = 11,563.60 : x
  2. Step 2: Convert to fraction form
    21,405.10/32,107.65 = 11,563.60/x
  3. Step 3: Cross multiply
    21,405.10x = 32,107.65 × 11,563.60
  4. Step 4: Simplify right side
    21,405.10x = 371,280,021.54
  5. Step 5: Solve for x
    x = 371,280,021.54/21,405.10
  6. Step 6: Final answer
    x = 17,345.40

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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.