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Finding the Fourth Proportional to 30,948, 42,713.64 and 18,372.48

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Solution

The fourth proportional to 30,948, 42,713.64 and 18,372.48 is: 25,357.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,948 : 42,713.64 = 18,372.48 : x
  2. Step 2: Convert to fraction form
    30,948/42,713.64 = 18,372.48/x
  3. Step 3: Cross multiply
    30,948x = 42,713.64 × 18,372.48
  4. Step 4: Simplify right side
    30,948x = 784,755,496.63
  5. Step 5: Solve for x
    x = 784,755,496.63/30,948
  6. Step 6: Final answer
    x = 25,357.23

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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.