Home / 18,939.04-26,134.32-10,978.72

Finding the Fourth Proportional to 18,939.04, 26,134.32 and 10,978.72

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Solution

The fourth proportional to 18,939.04, 26,134.32 and 10,978.72 is: 15,149.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.04 : 26,134.32 = 10,978.72 : x
  2. Step 2: Convert to fraction form
    18,939.04/26,134.32 = 10,978.72/x
  3. Step 3: Cross multiply
    18,939.04x = 26,134.32 × 10,978.72
  4. Step 4: Simplify right side
    18,939.04x = 286,921,381.67
  5. Step 5: Solve for x
    x = 286,921,381.67/18,939.04
  6. Step 6: Final answer
    x = 15,149.73

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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.