Home / 30,321.30-45,426.53-21,980.63

Finding the Fourth Proportional to 30,321.30, 45,426.53 and 21,980.63

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Solution

The fourth proportional to 30,321.30, 45,426.53 and 21,980.63 is: 32,930.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,321.30 : 45,426.53 = 21,980.63 : x
  2. Step 2: Convert to fraction form
    30,321.30/45,426.53 = 21,980.63/x
  3. Step 3: Cross multiply
    30,321.30x = 45,426.53 × 21,980.63
  4. Step 4: Simplify right side
    30,321.30x = 998,503,748.11
  5. Step 5: Solve for x
    x = 998,503,748.11/30,321.30
  6. Step 6: Final answer
    x = 32,930.77

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Double scale
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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.