Home / 31,972.80-48,002.40-20,308.80

Finding the Fourth Proportional to 31,972.80, 48,002.40 and 20,308.80

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Solution

The fourth proportional to 31,972.80, 48,002.40 and 20,308.80 is: 30,490.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,972.80 : 48,002.40 = 20,308.80 : x
  2. Step 2: Convert to fraction form
    31,972.80/48,002.40 = 20,308.80/x
  3. Step 3: Cross multiply
    31,972.80x = 48,002.40 × 20,308.80
  4. Step 4: Simplify right side
    31,972.80x = 974,871,141.12
  5. Step 5: Solve for x
    x = 974,871,141.12/31,972.80
  6. Step 6: Final answer
    x = 30,490.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.