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Finding the Fourth Proportional to 12,051.84, 18,071.76 and 7,678.08

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Solution

The fourth proportional to 12,051.84, 18,071.76 and 7,678.08 is: 11,513.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,051.84 : 18,071.76 = 7,678.08 : x
  2. Step 2: Convert to fraction form
    12,051.84/18,071.76 = 7,678.08/x
  3. Step 3: Cross multiply
    12,051.84x = 18,071.76 × 7,678.08
  4. Step 4: Simplify right side
    12,051.84x = 138,756,419.02
  5. Step 5: Solve for x
    x = 138,756,419.02/12,051.84
  6. Step 6: Final answer
    x = 11,513.30

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1.5x scale

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.