Home / 15,238.29-21,009.25-12,685.87

Finding the Fourth Proportional to 15,238.29, 21,009.25 and 12,685.87

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Solution

The fourth proportional to 15,238.29, 21,009.25 and 12,685.87 is: 17,490.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,238.29 : 21,009.25 = 12,685.87 : x
  2. Step 2: Convert to fraction form
    15,238.29/21,009.25 = 12,685.87/x
  3. Step 3: Cross multiply
    15,238.29x = 21,009.25 × 12,685.87
  4. Step 4: Simplify right side
    15,238.29x = 266,520,614.30
  5. Step 5: Solve for x
    x = 266,520,614.30/15,238.29
  6. Step 6: Final answer
    x = 17,490.19

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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.