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Finding the Fourth Proportional to 15,609.69, 21,523.85 and 9,935.45

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Solution

The fourth proportional to 15,609.69, 21,523.85 and 9,935.45 is: 13,699.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,609.69 : 21,523.85 = 9,935.45 : x
  2. Step 2: Convert to fraction form
    15,609.69/21,523.85 = 9,935.45/x
  3. Step 3: Cross multiply
    15,609.69x = 21,523.85 × 9,935.45
  4. Step 4: Simplify right side
    15,609.69x = 213,849,135.48
  5. Step 5: Solve for x
    x = 213,849,135.48/15,609.69
  6. Step 6: Final answer
    x = 13,699.77

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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.