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Finding the Fourth Proportional to 19,691.62, 29,528.76 and 7,208.40

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Solution

The fourth proportional to 19,691.62, 29,528.76 and 7,208.40 is: 10,809.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,691.62 : 29,528.76 = 7,208.40 : x
  2. Step 2: Convert to fraction form
    19,691.62/29,528.76 = 7,208.40/x
  3. Step 3: Cross multiply
    19,691.62x = 29,528.76 × 7,208.40
  4. Step 4: Simplify right side
    19,691.62x = 212,855,113.58
  5. Step 5: Solve for x
    x = 212,855,113.58/19,691.62
  6. Step 6: Final answer
    x = 10,809.43

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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.