Home / 30,928.74-42,680.49-16,781.28

Finding the Fourth Proportional to 30,928.74, 42,680.49 and 16,781.28

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Solution

The fourth proportional to 30,928.74, 42,680.49 and 16,781.28 is: 23,157.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,928.74 : 42,680.49 = 16,781.28 : x
  2. Step 2: Convert to fraction form
    30,928.74/42,680.49 = 16,781.28/x
  3. Step 3: Cross multiply
    30,928.74x = 42,680.49 × 16,781.28
  4. Step 4: Simplify right side
    30,928.74x = 716,233,253.23
  5. Step 5: Solve for x
    x = 716,233,253.23/30,928.74
  6. Step 6: Final answer
    x = 23,157.53

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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.