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Finding the Fourth Proportional to 15,585.62, 21,507.12 and 8,871.93

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Solution

The fourth proportional to 15,585.62, 21,507.12 and 8,871.93 is: 12,242.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,585.62 : 21,507.12 = 8,871.93 : x
  2. Step 2: Convert to fraction form
    15,585.62/21,507.12 = 8,871.93/x
  3. Step 3: Cross multiply
    15,585.62x = 21,507.12 × 8,871.93
  4. Step 4: Simplify right side
    15,585.62x = 190,809,663.14
  5. Step 5: Solve for x
    x = 190,809,663.14/15,585.62
  6. Step 6: Final answer
    x = 12,242.68

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1.5x scale

Why These Related Problems?

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