Home / 12,755.46-19,133.18-3,990.40

Finding the Fourth Proportional to 12,755.46, 19,133.18 and 3,990.40

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Solution

The fourth proportional to 12,755.46, 19,133.18 and 3,990.40 is: 5,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,755.46 : 19,133.18 = 3,990.40 : x
  2. Step 2: Convert to fraction form
    12,755.46/19,133.18 = 3,990.40/x
  3. Step 3: Cross multiply
    12,755.46x = 19,133.18 × 3,990.40
  4. Step 4: Simplify right side
    12,755.46x = 76,349,041.47
  5. Step 5: Solve for x
    x = 76,349,041.47/12,755.46
  6. Step 6: Final answer
    x = 5,985.60

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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.