Home / 18,913.95-26,120.25-15,589.71

Finding the Fourth Proportional to 18,913.95, 26,120.25 and 15,589.71

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Solution

The fourth proportional to 18,913.95, 26,120.25 and 15,589.71 is: 21,529.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.95 : 26,120.25 = 15,589.71 : x
  2. Step 2: Convert to fraction form
    18,913.95/26,120.25 = 15,589.71/x
  3. Step 3: Cross multiply
    18,913.95x = 26,120.25 × 15,589.71
  4. Step 4: Simplify right side
    18,913.95x = 407,207,122.63
  5. Step 5: Solve for x
    x = 407,207,122.63/18,913.95
  6. Step 6: Final answer
    x = 21,529.46

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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.