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Finding the Fourth Proportional to 15,857.60, 23,786.40 and 15,128.60

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Solution

The fourth proportional to 15,857.60, 23,786.40 and 15,128.60 is: 22,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.60 : 23,786.40 = 15,128.60 : x
  2. Step 2: Convert to fraction form
    15,857.60/23,786.40 = 15,128.60/x
  3. Step 3: Cross multiply
    15,857.60x = 23,786.40 × 15,128.60
  4. Step 4: Simplify right side
    15,857.60x = 359,854,931.04
  5. Step 5: Solve for x
    x = 359,854,931.04/15,857.60
  6. Step 6: Final answer
    x = 22,692.90

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Double scale
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Similar ratio
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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.