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Finding the Fourth Proportional to 15,688.92, 21,646.95 and 8,883.09

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Solution

The fourth proportional to 15,688.92, 21,646.95 and 8,883.09 is: 12,256.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.92 : 21,646.95 = 8,883.09 : x
  2. Step 2: Convert to fraction form
    15,688.92/21,646.95 = 8,883.09/x
  3. Step 3: Cross multiply
    15,688.92x = 21,646.95 × 8,883.09
  4. Step 4: Simplify right side
    15,688.92x = 192,291,805.08
  5. Step 5: Solve for x
    x = 192,291,805.08/15,688.92
  6. Step 6: Final answer
    x = 12,256.54

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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.