Home / 20,928.79-31,353.08-20,225.30

Finding the Fourth Proportional to 20,928.79, 31,353.08 and 20,225.30

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Solution

The fourth proportional to 20,928.79, 31,353.08 and 20,225.30 is: 30,299.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.79 : 31,353.08 = 20,225.30 : x
  2. Step 2: Convert to fraction form
    20,928.79/31,353.08 = 20,225.30/x
  3. Step 3: Cross multiply
    20,928.79x = 31,353.08 × 20,225.30
  4. Step 4: Simplify right side
    20,928.79x = 634,125,577.87
  5. Step 5: Solve for x
    x = 634,125,577.87/20,928.79
  6. Step 6: Final answer
    x = 30,299.20

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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.