Home / 5,421.60-8,132.40-5,166.45

Finding the Fourth Proportional to 5,421.60, 8,132.40 and 5,166.45

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Solution

The fourth proportional to 5,421.60, 8,132.40 and 5,166.45 is: 7,749.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.60 : 8,132.40 = 5,166.45 : x
  2. Step 2: Convert to fraction form
    5,421.60/8,132.40 = 5,166.45/x
  3. Step 3: Cross multiply
    5,421.60x = 8,132.40 × 5,166.45
  4. Step 4: Simplify right side
    5,421.60x = 42,015,637.98
  5. Step 5: Solve for x
    x = 42,015,637.98/5,421.60
  6. Step 6: Final answer
    x = 7,749.68

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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.