Home / 30,705.30-45,948.60-21,301.20

Finding the Fourth Proportional to 30,705.30, 45,948.60 and 21,301.20

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Solution

The fourth proportional to 30,705.30, 45,948.60 and 21,301.20 is: 31,875.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,705.30 : 45,948.60 = 21,301.20 : x
  2. Step 2: Convert to fraction form
    30,705.30/45,948.60 = 21,301.20/x
  3. Step 3: Cross multiply
    30,705.30x = 45,948.60 × 21,301.20
  4. Step 4: Simplify right side
    30,705.30x = 978,760,318.32
  5. Step 5: Solve for x
    x = 978,760,318.32/30,705.30
  6. Step 6: Final answer
    x = 31,875.94

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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.