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Finding the Fourth Proportional to 15,905.04, 21,956.88 and 9,940.02

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Solution

The fourth proportional to 15,905.04, 21,956.88 and 9,940.02 is: 13,722.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905.04 : 21,956.88 = 9,940.02 : x
  2. Step 2: Convert to fraction form
    15,905.04/21,956.88 = 9,940.02/x
  3. Step 3: Cross multiply
    15,905.04x = 21,956.88 × 9,940.02
  4. Step 4: Simplify right side
    15,905.04x = 218,251,826.34
  5. Step 5: Solve for x
    x = 218,251,826.34/15,905.04
  6. Step 6: Final answer
    x = 13,722.18

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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.