Home / 30,945.28-42,715.52-18,370

Finding the Fourth Proportional to 30,945.28, 42,715.52 and 18,370

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Solution

The fourth proportional to 30,945.28, 42,715.52 and 18,370 is: 25,357.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,945.28 : 42,715.52 = 18,370 : x
  2. Step 2: Convert to fraction form
    30,945.28/42,715.52 = 18,370/x
  3. Step 3: Cross multiply
    30,945.28x = 42,715.52 × 18,370
  4. Step 4: Simplify right side
    30,945.28x = 784,684,102.40
  5. Step 5: Solve for x
    x = 784,684,102.40/30,945.28
  6. Step 6: Final answer
    x = 25,357.15

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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.