Home / 8,543.40-12,815.10-7,668.60

Finding the Fourth Proportional to 8,543.40, 12,815.10 and 7,668.60

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Solution

The fourth proportional to 8,543.40, 12,815.10 and 7,668.60 is: 11,502.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,543.40 : 12,815.10 = 7,668.60 : x
  2. Step 2: Convert to fraction form
    8,543.40/12,815.10 = 7,668.60/x
  3. Step 3: Cross multiply
    8,543.40x = 12,815.10 × 7,668.60
  4. Step 4: Simplify right side
    8,543.40x = 98,273,875.86
  5. Step 5: Solve for x
    x = 98,273,875.86/8,543.40
  6. Step 6: Final answer
    x = 11,502.90

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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.