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Finding the Fourth Proportional to 30,246.90, 45,368.46 and 9,186.90

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Solution

The fourth proportional to 30,246.90, 45,368.46 and 9,186.90 is: 13,779.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,246.90 : 45,368.46 = 9,186.90 : x
  2. Step 2: Convert to fraction form
    30,246.90/45,368.46 = 9,186.90/x
  3. Step 3: Cross multiply
    30,246.90x = 45,368.46 × 9,186.90
  4. Step 4: Simplify right side
    30,246.90x = 416,795,505.17
  5. Step 5: Solve for x
    x = 416,795,505.17/30,246.90
  6. Step 6: Final answer
    x = 13,779.78

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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.