Home / 8,979.45-12,390.15-5,000.46

Finding the Fourth Proportional to 8,979.45, 12,390.15 and 5,000.46

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Solution

The fourth proportional to 8,979.45, 12,390.15 and 5,000.46 is: 6,899.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.45 : 12,390.15 = 5,000.46 : x
  2. Step 2: Convert to fraction form
    8,979.45/12,390.15 = 5,000.46/x
  3. Step 3: Cross multiply
    8,979.45x = 12,390.15 × 5,000.46
  4. Step 4: Simplify right side
    8,979.45x = 61,956,449.47
  5. Step 5: Solve for x
    x = 61,956,449.47/8,979.45
  6. Step 6: Final answer
    x = 6,899.80

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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.