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Finding the Fourth Proportional to 15,089.51, 20,821.77 and 8,374.47

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Solution

The fourth proportional to 15,089.51, 20,821.77 and 8,374.47 is: 11,555.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,089.51 : 20,821.77 = 8,374.47 : x
  2. Step 2: Convert to fraction form
    15,089.51/20,821.77 = 8,374.47/x
  3. Step 3: Cross multiply
    15,089.51x = 20,821.77 × 8,374.47
  4. Step 4: Simplify right side
    15,089.51x = 174,371,288.21
  5. Step 5: Solve for x
    x = 174,371,288.21/15,089.51
  6. Step 6: Final answer
    x = 11,555.80

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1.5x scale

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.