Home / 8,140.30-12,210.45-4,859.80

Finding the Fourth Proportional to 8,140.30, 12,210.45 and 4,859.80

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Solution

The fourth proportional to 8,140.30, 12,210.45 and 4,859.80 is: 7,289.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,140.30 : 12,210.45 = 4,859.80 : x
  2. Step 2: Convert to fraction form
    8,140.30/12,210.45 = 4,859.80/x
  3. Step 3: Cross multiply
    8,140.30x = 12,210.45 × 4,859.80
  4. Step 4: Simplify right side
    8,140.30x = 59,340,344.91
  5. Step 5: Solve for x
    x = 59,340,344.91/8,140.30
  6. Step 6: Final answer
    x = 7,289.70

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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.