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Finding the Fourth Proportional to 7,875.99, 11,830.19 and 7,613.55

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Solution

The fourth proportional to 7,875.99, 11,830.19 and 7,613.55 is: 11,435.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,875.99 : 11,830.19 = 7,613.55 : x
  2. Step 2: Convert to fraction form
    7,875.99/11,830.19 = 7,613.55/x
  3. Step 3: Cross multiply
    7,875.99x = 11,830.19 × 7,613.55
  4. Step 4: Simplify right side
    7,875.99x = 90,069,705.01
  5. Step 5: Solve for x
    x = 90,069,705.01/7,875.99
  6. Step 6: Final answer
    x = 11,435.99

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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.