Home / 19,659.09-27,139.38-15,402.93

Finding the Fourth Proportional to 19,659.09, 27,139.38 and 15,402.93

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Solution

The fourth proportional to 19,659.09, 27,139.38 and 15,402.93 is: 21,263.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659.09 : 27,139.38 = 15,402.93 : x
  2. Step 2: Convert to fraction form
    19,659.09/27,139.38 = 15,402.93/x
  3. Step 3: Cross multiply
    19,659.09x = 27,139.38 × 15,402.93
  4. Step 4: Simplify right side
    19,659.09x = 418,025,970.38
  5. Step 5: Solve for x
    x = 418,025,970.38/19,659.09
  6. Step 6: Final answer
    x = 21,263.75

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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.