Home / 8,720.39-12,031.16-5,318.60

Finding the Fourth Proportional to 8,720.39, 12,031.16 and 5,318.60

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Solution

The fourth proportional to 8,720.39, 12,031.16 and 5,318.60 is: 7,337.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.39 : 12,031.16 = 5,318.60 : x
  2. Step 2: Convert to fraction form
    8,720.39/12,031.16 = 5,318.60/x
  3. Step 3: Cross multiply
    8,720.39x = 12,031.16 × 5,318.60
  4. Step 4: Simplify right side
    8,720.39x = 63,988,840.83
  5. Step 5: Solve for x
    x = 63,988,840.83/8,720.39
  6. Step 6: Final answer
    x = 7,337.84

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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.