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Finding the Fourth Proportional to 12,928.38, 17,840.67 and 7,901.01

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Solution

The fourth proportional to 12,928.38, 17,840.67 and 7,901.01 is: 10,903.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.38 : 17,840.67 = 7,901.01 : x
  2. Step 2: Convert to fraction form
    12,928.38/17,840.67 = 7,901.01/x
  3. Step 3: Cross multiply
    12,928.38x = 17,840.67 × 7,901.01
  4. Step 4: Simplify right side
    12,928.38x = 140,959,312.08
  5. Step 5: Solve for x
    x = 140,959,312.08/12,928.38
  6. Step 6: Final answer
    x = 10,903.09

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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.