Home / 13,561.40-20,342.10-8,910.80

Finding the Fourth Proportional to 13,561.40, 20,342.10 and 8,910.80

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Solution

The fourth proportional to 13,561.40, 20,342.10 and 8,910.80 is: 13,366.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,561.40 : 20,342.10 = 8,910.80 : x
  2. Step 2: Convert to fraction form
    13,561.40/20,342.10 = 8,910.80/x
  3. Step 3: Cross multiply
    13,561.40x = 20,342.10 × 8,910.80
  4. Step 4: Simplify right side
    13,561.40x = 181,264,384.68
  5. Step 5: Solve for x
    x = 181,264,384.68/13,561.40
  6. Step 6: Final answer
    x = 13,366.20

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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.