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Finding the Fourth Proportional to 15,675.84, 21,631.92 and 8,602.08

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Solution

The fourth proportional to 15,675.84, 21,631.92 and 8,602.08 is: 11,870.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,675.84 : 21,631.92 = 8,602.08 : x
  2. Step 2: Convert to fraction form
    15,675.84/21,631.92 = 8,602.08/x
  3. Step 3: Cross multiply
    15,675.84x = 21,631.92 × 8,602.08
  4. Step 4: Simplify right side
    15,675.84x = 186,079,506.39
  5. Step 5: Solve for x
    x = 186,079,506.39/15,675.84
  6. Step 6: Final answer
    x = 11,870.46

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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.