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Finding the Fourth Proportional to 18,615.79, 27,925.04 and 6,929

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Solution

The fourth proportional to 18,615.79, 27,925.04 and 6,929 is: 10,394.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.79 : 27,925.04 = 6,929 : x
  2. Step 2: Convert to fraction form
    18,615.79/27,925.04 = 6,929/x
  3. Step 3: Cross multiply
    18,615.79x = 27,925.04 × 6,929
  4. Step 4: Simplify right side
    18,615.79x = 193,492,602.16
  5. Step 5: Solve for x
    x = 193,492,602.16/18,615.79
  6. Step 6: Final answer
    x = 10,394.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.