Home / 30,715.63-42,388.93-17,287.75

Finding the Fourth Proportional to 30,715.63, 42,388.93 and 17,287.75

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Solution

The fourth proportional to 30,715.63, 42,388.93 and 17,287.75 is: 23,857.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,715.63 : 42,388.93 = 17,287.75 : x
  2. Step 2: Convert to fraction form
    30,715.63/42,388.93 = 17,287.75/x
  3. Step 3: Cross multiply
    30,715.63x = 42,388.93 × 17,287.75
  4. Step 4: Simplify right side
    30,715.63x = 732,809,299.20
  5. Step 5: Solve for x
    x = 732,809,299.20/30,715.63
  6. Step 6: Final answer
    x = 23,857.87

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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.