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Finding the Fourth Proportional to 7,287.76, 10,056.99 and 4,143.88

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Solution

The fourth proportional to 7,287.76, 10,056.99 and 4,143.88 is: 5,718.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,287.76 : 10,056.99 = 4,143.88 : x
  2. Step 2: Convert to fraction form
    7,287.76/10,056.99 = 4,143.88/x
  3. Step 3: Cross multiply
    7,287.76x = 10,056.99 × 4,143.88
  4. Step 4: Simplify right side
    7,287.76x = 41,674,959.72
  5. Step 5: Solve for x
    x = 41,674,959.72/7,287.76
  6. Step 6: Final answer
    x = 5,718.49

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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.