Home / 12,935.09-19,402.70-5,143.91

Finding the Fourth Proportional to 12,935.09, 19,402.70 and 5,143.91

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Solution

The fourth proportional to 12,935.09, 19,402.70 and 5,143.91 is: 7,715.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,935.09 : 19,402.70 = 5,143.91 : x
  2. Step 2: Convert to fraction form
    12,935.09/19,402.70 = 5,143.91/x
  3. Step 3: Cross multiply
    12,935.09x = 19,402.70 × 5,143.91
  4. Step 4: Simplify right side
    12,935.09x = 99,805,619.82
  5. Step 5: Solve for x
    x = 99,805,619.82/12,935.09
  6. Step 6: Final answer
    x = 7,715.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.