Home / 20,703.40-28,570.49-11,271.96

Finding the Fourth Proportional to 20,703.40, 28,570.49 and 11,271.96

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Solution

The fourth proportional to 20,703.40, 28,570.49 and 11,271.96 is: 15,555.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.40 : 28,570.49 = 11,271.96 : x
  2. Step 2: Convert to fraction form
    20,703.40/28,570.49 = 11,271.96/x
  3. Step 3: Cross multiply
    20,703.40x = 28,570.49 × 11,271.96
  4. Step 4: Simplify right side
    20,703.40x = 322,045,406.37
  5. Step 5: Solve for x
    x = 322,045,406.37/20,703.40
  6. Step 6: Final answer
    x = 15,555.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.