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Finding the Fourth Proportional to 30,347.84, 45,502.08 and 20,961.60

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Solution

The fourth proportional to 30,347.84, 45,502.08 and 20,961.60 is: 31,428.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,347.84 : 45,502.08 = 20,961.60 : x
  2. Step 2: Convert to fraction form
    30,347.84/45,502.08 = 20,961.60/x
  3. Step 3: Cross multiply
    30,347.84x = 45,502.08 × 20,961.60
  4. Step 4: Simplify right side
    30,347.84x = 953,796,400.13
  5. Step 5: Solve for x
    x = 953,796,400.13/30,347.84
  6. Step 6: Final answer
    x = 31,428.81

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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.