Home / 20,700.81-31,047.51-8,861.22

Finding the Fourth Proportional to 20,700.81, 31,047.51 and 8,861.22

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Solution

The fourth proportional to 20,700.81, 31,047.51 and 8,861.22 is: 13,290.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.81 : 31,047.51 = 8,861.22 : x
  2. Step 2: Convert to fraction form
    20,700.81/31,047.51 = 8,861.22/x
  3. Step 3: Cross multiply
    20,700.81x = 31,047.51 × 8,861.22
  4. Step 4: Simplify right side
    20,700.81x = 275,118,816.56
  5. Step 5: Solve for x
    x = 275,118,816.56/20,700.81
  6. Step 6: Final answer
    x = 13,290.24

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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.