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Finding the Fourth Proportional to 19,490.63, 29,248.90 and 7,178.63

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Solution

The fourth proportional to 19,490.63, 29,248.90 and 7,178.63 is: 10,772.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,490.63 : 29,248.90 = 7,178.63 : x
  2. Step 2: Convert to fraction form
    19,490.63/29,248.90 = 7,178.63/x
  3. Step 3: Cross multiply
    19,490.63x = 29,248.90 × 7,178.63
  4. Step 4: Simplify right side
    19,490.63x = 209,966,866.82
  5. Step 5: Solve for x
    x = 209,966,866.82/19,490.63
  6. Step 6: Final answer
    x = 10,772.71

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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.