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Finding the Fourth Proportional to 15,374.00, 21,215.72 and 8,659.51

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Solution

The fourth proportional to 15,374.00, 21,215.72 and 8,659.51 is: 11,949.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,374.00 : 21,215.72 = 8,659.51 : x
  2. Step 2: Convert to fraction form
    15,374.00/21,215.72 = 8,659.51/x
  3. Step 3: Cross multiply
    15,374.00x = 21,215.72 × 8,659.51
  4. Step 4: Simplify right side
    15,374.00x = 183,717,708.11
  5. Step 5: Solve for x
    x = 183,717,708.11/15,374.00
  6. Step 6: Final answer
    x = 11,949.89

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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.