Home / 30,680.32-42,079.04-30,316.80

Finding the Fourth Proportional to 30,680.32, 42,079.04 and 30,316.80

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Solution

The fourth proportional to 30,680.32, 42,079.04 and 30,316.80 is: 41,580.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,680.32 : 42,079.04 = 30,316.80 : x
  2. Step 2: Convert to fraction form
    30,680.32/42,079.04 = 30,316.80/x
  3. Step 3: Cross multiply
    30,680.32x = 42,079.04 × 30,316.80
  4. Step 4: Simplify right side
    30,680.32x = 1,275,701,839.87
  5. Step 5: Solve for x
    x = 1,275,701,839.87/30,680.32
  6. Step 6: Final answer
    x = 41,580.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.