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Finding the Fourth Proportional to 19,613.64, 27,066.80 and 10,661.12

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Solution

The fourth proportional to 19,613.64, 27,066.80 and 10,661.12 is: 14,712.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,613.64 : 27,066.80 = 10,661.12 : x
  2. Step 2: Convert to fraction form
    19,613.64/27,066.80 = 10,661.12/x
  3. Step 3: Cross multiply
    19,613.64x = 27,066.80 × 10,661.12
  4. Step 4: Simplify right side
    19,613.64x = 288,562,402.82
  5. Step 5: Solve for x
    x = 288,562,402.82/19,613.64
  6. Step 6: Final answer
    x = 14,712.33

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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.