Home / 13,665.92-18,851.60-9,136.40

Finding the Fourth Proportional to 13,665.92, 18,851.60 and 9,136.40

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Solution

The fourth proportional to 13,665.92, 18,851.60 and 9,136.40 is: 12,603.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,665.92 : 18,851.60 = 9,136.40 : x
  2. Step 2: Convert to fraction form
    13,665.92/18,851.60 = 9,136.40/x
  3. Step 3: Cross multiply
    13,665.92x = 18,851.60 × 9,136.40
  4. Step 4: Simplify right side
    13,665.92x = 172,235,758.24
  5. Step 5: Solve for x
    x = 172,235,758.24/13,665.92
  6. Step 6: Final answer
    x = 12,603.31

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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.