Home / 8,117.40-12,143.70-7,339.80

Finding the Fourth Proportional to 8,117.40, 12,143.70 and 7,339.80

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Solution

The fourth proportional to 8,117.40, 12,143.70 and 7,339.80 is: 10,980.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,117.40 : 12,143.70 = 7,339.80 : x
  2. Step 2: Convert to fraction form
    8,117.40/12,143.70 = 7,339.80/x
  3. Step 3: Cross multiply
    8,117.40x = 12,143.70 × 7,339.80
  4. Step 4: Simplify right side
    8,117.40x = 89,132,329.26
  5. Step 5: Solve for x
    x = 89,132,329.26/8,117.40
  6. Step 6: Final answer
    x = 10,980.40

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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.