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Finding the Fourth Proportional to 15,658.84, 21,609.48 and 8,585.18

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Solution

The fourth proportional to 15,658.84, 21,609.48 and 8,585.18 is: 11,847.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,658.84 : 21,609.48 = 8,585.18 : x
  2. Step 2: Convert to fraction form
    15,658.84/21,609.48 = 8,585.18/x
  3. Step 3: Cross multiply
    15,658.84x = 21,609.48 × 8,585.18
  4. Step 4: Simplify right side
    15,658.84x = 185,521,275.51
  5. Step 5: Solve for x
    x = 185,521,275.51/15,658.84
  6. Step 6: Final answer
    x = 11,847.70

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.