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Finding the Fourth Proportional to 11,885.79, 17,806.68 and 8,590.71

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Solution

The fourth proportional to 11,885.79, 17,806.68 and 8,590.71 is: 12,870.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,885.79 : 17,806.68 = 8,590.71 : x
  2. Step 2: Convert to fraction form
    11,885.79/17,806.68 = 8,590.71/x
  3. Step 3: Cross multiply
    11,885.79x = 17,806.68 × 8,590.71
  4. Step 4: Simplify right side
    11,885.79x = 152,972,023.94
  5. Step 5: Solve for x
    x = 152,972,023.94/11,885.79
  6. Step 6: Final answer
    x = 12,870.16

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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.