Home / 8,315.90-12,459.45-5,392.70

Finding the Fourth Proportional to 8,315.90, 12,459.45 and 5,392.70

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Solution

The fourth proportional to 8,315.90, 12,459.45 and 5,392.70 is: 8,079.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,315.90 : 12,459.45 = 5,392.70 : x
  2. Step 2: Convert to fraction form
    8,315.90/12,459.45 = 5,392.70/x
  3. Step 3: Cross multiply
    8,315.90x = 12,459.45 × 5,392.70
  4. Step 4: Simplify right side
    8,315.90x = 67,190,076.02
  5. Step 5: Solve for x
    x = 67,190,076.02/8,315.90
  6. Step 6: Final answer
    x = 8,079.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.