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Finding the Fourth Proportional to 19,551.51, 26,974.01 and 12,840.77

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Solution

The fourth proportional to 19,551.51, 26,974.01 and 12,840.77 is: 17,715.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,551.51 : 26,974.01 = 12,840.77 : x
  2. Step 2: Convert to fraction form
    19,551.51/26,974.01 = 12,840.77/x
  3. Step 3: Cross multiply
    19,551.51x = 26,974.01 × 12,840.77
  4. Step 4: Simplify right side
    19,551.51x = 346,367,157.92
  5. Step 5: Solve for x
    x = 346,367,157.92/19,551.51
  6. Step 6: Final answer
    x = 17,715.62

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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.