Home / 20,972.94-31,420.35-10,430.88

Finding the Fourth Proportional to 20,972.94, 31,420.35 and 10,430.88

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Solution

The fourth proportional to 20,972.94, 31,420.35 and 10,430.88 is: 15,626.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.94 : 31,420.35 = 10,430.88 : x
  2. Step 2: Convert to fraction form
    20,972.94/31,420.35 = 10,430.88/x
  3. Step 3: Cross multiply
    20,972.94x = 31,420.35 × 10,430.88
  4. Step 4: Simplify right side
    20,972.94x = 327,741,900.41
  5. Step 5: Solve for x
    x = 327,741,900.41/20,972.94
  6. Step 6: Final answer
    x = 15,626.89

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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.