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Finding the Fourth Proportional to 30,640.56, 42,283.02 and 17,213.28

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Solution

The fourth proportional to 30,640.56, 42,283.02 and 17,213.28 is: 23,753.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,640.56 : 42,283.02 = 17,213.28 : x
  2. Step 2: Convert to fraction form
    30,640.56/42,283.02 = 17,213.28/x
  3. Step 3: Cross multiply
    30,640.56x = 42,283.02 × 17,213.28
  4. Step 4: Simplify right side
    30,640.56x = 727,829,462.51
  5. Step 5: Solve for x
    x = 727,829,462.51/30,640.56
  6. Step 6: Final answer
    x = 23,753.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.