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Finding the Fourth Proportional to 19,320, 26,661.60 and 10,488

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Solution

The fourth proportional to 19,320, 26,661.60 and 10,488 is: 14,473.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,320 : 26,661.60 = 10,488 : x
  2. Step 2: Convert to fraction form
    19,320/26,661.60 = 10,488/x
  3. Step 3: Cross multiply
    19,320x = 26,661.60 × 10,488
  4. Step 4: Simplify right side
    19,320x = 279,626,860.80
  5. Step 5: Solve for x
    x = 279,626,860.80/19,320
  6. Step 6: Final answer
    x = 14,473.44

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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.