Home / 20,655.20-31,047.60-20,266.40

Finding the Fourth Proportional to 20,655.20, 31,047.60 and 20,266.40

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Solution

The fourth proportional to 20,655.20, 31,047.60 and 20,266.40 is: 30,463.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.20 : 31,047.60 = 20,266.40 : x
  2. Step 2: Convert to fraction form
    20,655.20/31,047.60 = 20,266.40/x
  3. Step 3: Cross multiply
    20,655.20x = 31,047.60 × 20,266.40
  4. Step 4: Simplify right side
    20,655.20x = 629,223,080.64
  5. Step 5: Solve for x
    x = 629,223,080.64/20,655.20
  6. Step 6: Final answer
    x = 30,463.18

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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.