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Finding the Fourth Proportional to 14,991.93, 20,686.05 and 8,620.74

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Solution

The fourth proportional to 14,991.93, 20,686.05 and 8,620.74 is: 11,895.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.93 : 20,686.05 = 8,620.74 : x
  2. Step 2: Convert to fraction form
    14,991.93/20,686.05 = 8,620.74/x
  3. Step 3: Cross multiply
    14,991.93x = 20,686.05 × 8,620.74
  4. Step 4: Simplify right side
    14,991.93x = 178,329,058.68
  5. Step 5: Solve for x
    x = 178,329,058.68/14,991.93
  6. Step 6: Final answer
    x = 11,895.00

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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.