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Finding the Fourth Proportional to 15,666.91, 21,621.47 and 8,952.38

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Solution

The fourth proportional to 15,666.91, 21,621.47 and 8,952.38 is: 12,354.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,666.91 : 21,621.47 = 8,952.38 : x
  2. Step 2: Convert to fraction form
    15,666.91/21,621.47 = 8,952.38/x
  3. Step 3: Cross multiply
    15,666.91x = 21,621.47 × 8,952.38
  4. Step 4: Simplify right side
    15,666.91x = 193,563,615.60
  5. Step 5: Solve for x
    x = 193,563,615.60/15,666.91
  6. Step 6: Final answer
    x = 12,354.94

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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.