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Finding the Fourth Proportional to 19,192.76, 28,789.14 and 10,979

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Solution

The fourth proportional to 19,192.76, 28,789.14 and 10,979 is: 16,468.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,192.76 : 28,789.14 = 10,979 : x
  2. Step 2: Convert to fraction form
    19,192.76/28,789.14 = 10,979/x
  3. Step 3: Cross multiply
    19,192.76x = 28,789.14 × 10,979
  4. Step 4: Simplify right side
    19,192.76x = 316,075,968.06
  5. Step 5: Solve for x
    x = 316,075,968.06/19,192.76
  6. Step 6: Final answer
    x = 16,468.50

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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.