Home / 11,512.81-15,870.76-8,145.24

Finding the Fourth Proportional to 11,512.81, 15,870.76 and 8,145.24

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Solution

The fourth proportional to 11,512.81, 15,870.76 and 8,145.24 is: 11,228.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,512.81 : 15,870.76 = 8,145.24 : x
  2. Step 2: Convert to fraction form
    11,512.81/15,870.76 = 8,145.24/x
  3. Step 3: Cross multiply
    11,512.81x = 15,870.76 × 8,145.24
  4. Step 4: Simplify right side
    11,512.81x = 129,271,149.18
  5. Step 5: Solve for x
    x = 129,271,149.18/11,512.81
  6. Step 6: Final answer
    x = 11,228.46

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Half scale
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Double scale
Find fourth proportional to 11,513.81, 15,872.14 and 8,146.24
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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.