Home / 9,120.65-12,586.40-5,143.04

Finding the Fourth Proportional to 9,120.65, 12,586.40 and 5,143.04

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Solution

The fourth proportional to 9,120.65, 12,586.40 and 5,143.04 is: 7,097.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.65 : 12,586.40 = 5,143.04 : x
  2. Step 2: Convert to fraction form
    9,120.65/12,586.40 = 5,143.04/x
  3. Step 3: Cross multiply
    9,120.65x = 12,586.40 × 5,143.04
  4. Step 4: Simplify right side
    9,120.65x = 64,732,336.49
  5. Step 5: Solve for x
    x = 64,732,336.49/9,120.65
  6. Step 6: Final answer
    x = 7,097.34

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Half scale
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Double scale
Find fourth proportional to 9,121.65, 12,587.78 and 5,144.04
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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.