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Finding the Fourth Proportional to 12,561.62, 17,335.18 and 7,848.64

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Solution

The fourth proportional to 12,561.62, 17,335.18 and 7,848.64 is: 10,831.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.62 : 17,335.18 = 7,848.64 : x
  2. Step 2: Convert to fraction form
    12,561.62/17,335.18 = 7,848.64/x
  3. Step 3: Cross multiply
    12,561.62x = 17,335.18 × 7,848.64
  4. Step 4: Simplify right side
    12,561.62x = 136,057,587.16
  5. Step 5: Solve for x
    x = 136,057,587.16/12,561.62
  6. Step 6: Final answer
    x = 10,831.21

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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.