Home / 31,680.61-43,679.50-20,330.08

Finding the Fourth Proportional to 31,680.61, 43,679.50 and 20,330.08

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Solution

The fourth proportional to 31,680.61, 43,679.50 and 20,330.08 is: 28,030.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,680.61 : 43,679.50 = 20,330.08 : x
  2. Step 2: Convert to fraction form
    31,680.61/43,679.50 = 20,330.08/x
  3. Step 3: Cross multiply
    31,680.61x = 43,679.50 × 20,330.08
  4. Step 4: Simplify right side
    31,680.61x = 888,007,729.36
  5. Step 5: Solve for x
    x = 888,007,729.36/31,680.61
  6. Step 6: Final answer
    x = 28,030.01

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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.