Home / 15,121.04-20,856.67-9,142.34

Finding the Fourth Proportional to 15,121.04, 20,856.67 and 9,142.34

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Solution

The fourth proportional to 15,121.04, 20,856.67 and 9,142.34 is: 12,610.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,121.04 : 20,856.67 = 9,142.34 : x
  2. Step 2: Convert to fraction form
    15,121.04/20,856.67 = 9,142.34/x
  3. Step 3: Cross multiply
    15,121.04x = 20,856.67 × 9,142.34
  4. Step 4: Simplify right side
    15,121.04x = 190,678,641.27
  5. Step 5: Solve for x
    x = 190,678,641.27/15,121.04
  6. Step 6: Final answer
    x = 12,610.16

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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.