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Finding the Fourth Proportional to 8,718.68, 12,031.88 and 4,739.84

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Solution

The fourth proportional to 8,718.68, 12,031.88 and 4,739.84 is: 6,541.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.68 : 12,031.88 = 4,739.84 : x
  2. Step 2: Convert to fraction form
    8,718.68/12,031.88 = 4,739.84/x
  3. Step 3: Cross multiply
    8,718.68x = 12,031.88 × 4,739.84
  4. Step 4: Simplify right side
    8,718.68x = 57,029,186.10
  5. Step 5: Solve for x
    x = 57,029,186.10/8,718.68
  6. Step 6: Final answer
    x = 6,541.03

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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.