Home / 30,000.82-45,009.41-13,130.76

Finding the Fourth Proportional to 30,000.82, 45,009.41 and 13,130.76

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Solution

The fourth proportional to 30,000.82, 45,009.41 and 13,130.76 is: 19,699.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,000.82 : 45,009.41 = 13,130.76 : x
  2. Step 2: Convert to fraction form
    30,000.82/45,009.41 = 13,130.76/x
  3. Step 3: Cross multiply
    30,000.82x = 45,009.41 × 13,130.76
  4. Step 4: Simplify right side
    30,000.82x = 591,007,760.45
  5. Step 5: Solve for x
    x = 591,007,760.45/30,000.82
  6. Step 6: Final answer
    x = 19,699.72

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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.