Home / 30,639.12-42,279-17,207.32

Finding the Fourth Proportional to 30,639.12, 42,279 and 17,207.32

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Solution

The fourth proportional to 30,639.12, 42,279 and 17,207.32 is: 23,744.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,639.12 : 42,279 = 17,207.32 : x
  2. Step 2: Convert to fraction form
    30,639.12/42,279 = 17,207.32/x
  3. Step 3: Cross multiply
    30,639.12x = 42,279 × 17,207.32
  4. Step 4: Simplify right side
    30,639.12x = 727,508,282.28
  5. Step 5: Solve for x
    x = 727,508,282.28/30,639.12
  6. Step 6: Final answer
    x = 23,744.42

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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.