Home / 30,553.68-42,165.60-18,615.12

Finding the Fourth Proportional to 30,553.68, 42,165.60 and 18,615.12

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Solution

The fourth proportional to 30,553.68, 42,165.60 and 18,615.12 is: 25,689.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,553.68 : 42,165.60 = 18,615.12 : x
  2. Step 2: Convert to fraction form
    30,553.68/42,165.60 = 18,615.12/x
  3. Step 3: Cross multiply
    30,553.68x = 42,165.60 × 18,615.12
  4. Step 4: Simplify right side
    30,553.68x = 784,917,703.87
  5. Step 5: Solve for x
    x = 784,917,703.87/30,553.68
  6. Step 6: Final answer
    x = 25,689.79

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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.