Home / 18,877.50-28,426.37-13,981.86

Finding the Fourth Proportional to 18,877.50, 28,426.37 and 13,981.86

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Solution

The fourth proportional to 18,877.50, 28,426.37 and 13,981.86 is: 21,054.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,877.50 : 28,426.37 = 13,981.86 : x
  2. Step 2: Convert to fraction form
    18,877.50/28,426.37 = 13,981.86/x
  3. Step 3: Cross multiply
    18,877.50x = 28,426.37 × 13,981.86
  4. Step 4: Simplify right side
    18,877.50x = 397,453,455.74
  5. Step 5: Solve for x
    x = 397,453,455.74/18,877.50
  6. Step 6: Final answer
    x = 21,054.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.