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Finding the Fourth Proportional to 15,869.31, 21,898.88 and 9,157.10

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Solution

The fourth proportional to 15,869.31, 21,898.88 and 9,157.10 is: 12,636.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,869.31 : 21,898.88 = 9,157.10 : x
  2. Step 2: Convert to fraction form
    15,869.31/21,898.88 = 9,157.10/x
  3. Step 3: Cross multiply
    15,869.31x = 21,898.88 × 9,157.10
  4. Step 4: Simplify right side
    15,869.31x = 200,530,188.26
  5. Step 5: Solve for x
    x = 200,530,188.26/15,869.31
  6. Step 6: Final answer
    x = 12,636.36

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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.