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Finding the Fourth Proportional to 19,356, 28,987.23 and 11,010.71

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Solution

The fourth proportional to 19,356, 28,987.23 and 11,010.71 is: 16,489.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,356 : 28,987.23 = 11,010.71 : x
  2. Step 2: Convert to fraction form
    19,356/28,987.23 = 11,010.71/x
  3. Step 3: Cross multiply
    19,356x = 28,987.23 × 11,010.71
  4. Step 4: Simplify right side
    19,356x = 319,169,838.30
  5. Step 5: Solve for x
    x = 319,169,838.30/19,356
  6. Step 6: Final answer
    x = 16,489.45

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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.