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Finding the Fourth Proportional to 12,950.64, 17,870.09 and 7,917.03

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Solution

The fourth proportional to 12,950.64, 17,870.09 and 7,917.03 is: 10,924.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,950.64 : 17,870.09 = 7,917.03 : x
  2. Step 2: Convert to fraction form
    12,950.64/17,870.09 = 7,917.03/x
  3. Step 3: Cross multiply
    12,950.64x = 17,870.09 × 7,917.03
  4. Step 4: Simplify right side
    12,950.64x = 141,477,999.05
  5. Step 5: Solve for x
    x = 141,477,999.05/12,950.64
  6. Step 6: Final answer
    x = 10,924.40

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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.