Home / 30,928.14-42,680.52-16,780.68

Finding the Fourth Proportional to 30,928.14, 42,680.52 and 16,780.68

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Solution

The fourth proportional to 30,928.14, 42,680.52 and 16,780.68 is: 23,157.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,928.14 : 42,680.52 = 16,780.68 : x
  2. Step 2: Convert to fraction form
    30,928.14/42,680.52 = 16,780.68/x
  3. Step 3: Cross multiply
    30,928.14x = 42,680.52 × 16,780.68
  4. Step 4: Simplify right side
    30,928.14x = 716,208,148.35
  5. Step 5: Solve for x
    x = 716,208,148.35/30,928.14
  6. Step 6: Final answer
    x = 23,157.17

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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.