Home / 11,147.10-16,720.65-10,455.90

Finding the Fourth Proportional to 11,147.10, 16,720.65 and 10,455.90

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Solution

The fourth proportional to 11,147.10, 16,720.65 and 10,455.90 is: 15,683.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,147.10 : 16,720.65 = 10,455.90 : x
  2. Step 2: Convert to fraction form
    11,147.10/16,720.65 = 10,455.90/x
  3. Step 3: Cross multiply
    11,147.10x = 16,720.65 × 10,455.90
  4. Step 4: Simplify right side
    11,147.10x = 174,829,444.34
  5. Step 5: Solve for x
    x = 174,829,444.34/11,147.10
  6. Step 6: Final answer
    x = 15,683.85

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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.