Home / 13,721.30-20,590.61-7,152.10

Finding the Fourth Proportional to 13,721.30, 20,590.61 and 7,152.10

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Solution

The fourth proportional to 13,721.30, 20,590.61 and 7,152.10 is: 10,732.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.30 : 20,590.61 = 7,152.10 : x
  2. Step 2: Convert to fraction form
    13,721.30/20,590.61 = 7,152.10/x
  3. Step 3: Cross multiply
    13,721.30x = 20,590.61 × 7,152.10
  4. Step 4: Simplify right side
    13,721.30x = 147,266,014.54
  5. Step 5: Solve for x
    x = 147,266,014.54/13,721.30
  6. Step 6: Final answer
    x = 10,732.66

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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.