Home / 6,142.50-9,213.75-1,985.99

Finding the Fourth Proportional to 6,142.50, 9,213.75 and 1,985.99

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Solution

The fourth proportional to 6,142.50, 9,213.75 and 1,985.99 is: 2,978.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,142.50 : 9,213.75 = 1,985.99 : x
  2. Step 2: Convert to fraction form
    6,142.50/9,213.75 = 1,985.99/x
  3. Step 3: Cross multiply
    6,142.50x = 9,213.75 × 1,985.99
  4. Step 4: Simplify right side
    6,142.50x = 18,298,369.29
  5. Step 5: Solve for x
    x = 18,298,369.29/6,142.50
  6. Step 6: Final answer
    x = 2,978.98

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Half scale
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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.