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Finding the Fourth Proportional to 18,854.40, 26,019.03 and 12,885.93

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Solution

The fourth proportional to 18,854.40, 26,019.03 and 12,885.93 is: 17,782.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,854.40 : 26,019.03 = 12,885.93 : x
  2. Step 2: Convert to fraction form
    18,854.40/26,019.03 = 12,885.93/x
  3. Step 3: Cross multiply
    18,854.40x = 26,019.03 × 12,885.93
  4. Step 4: Simplify right side
    18,854.40x = 335,279,399.25
  5. Step 5: Solve for x
    x = 335,279,399.25/18,854.40
  6. Step 6: Final answer
    x = 17,782.55

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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.