Home / 7,724.51-11,487.38-7,478.47

Finding the Fourth Proportional to 7,724.51, 11,487.38 and 7,478.47

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Solution

The fourth proportional to 7,724.51, 11,487.38 and 7,478.47 is: 11,121.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,724.51 : 11,487.38 = 7,478.47 : x
  2. Step 2: Convert to fraction form
    7,724.51/11,487.38 = 7,478.47/x
  3. Step 3: Cross multiply
    7,724.51x = 11,487.38 × 7,478.47
  4. Step 4: Simplify right side
    7,724.51x = 85,907,931.88
  5. Step 5: Solve for x
    x = 85,907,931.88/7,724.51
  6. Step 6: Final answer
    x = 11,121.48

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.