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Finding the Fourth Proportional to 13,477.40, 20,216.10 and 10,658.60

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Solution

The fourth proportional to 13,477.40, 20,216.10 and 10,658.60 is: 15,987.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,477.40 : 20,216.10 = 10,658.60 : x
  2. Step 2: Convert to fraction form
    13,477.40/20,216.10 = 10,658.60/x
  3. Step 3: Cross multiply
    13,477.40x = 20,216.10 × 10,658.60
  4. Step 4: Simplify right side
    13,477.40x = 215,475,323.46
  5. Step 5: Solve for x
    x = 215,475,323.46/13,477.40
  6. Step 6: Final answer
    x = 15,987.90

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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.