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Finding the Fourth Proportional to 14,385.88, 19,856.24 and 12,891.24

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Solution

The fourth proportional to 14,385.88, 19,856.24 and 12,891.24 is: 17,793.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,385.88 : 19,856.24 = 12,891.24 : x
  2. Step 2: Convert to fraction form
    14,385.88/19,856.24 = 12,891.24/x
  3. Step 3: Cross multiply
    14,385.88x = 19,856.24 × 12,891.24
  4. Step 4: Simplify right side
    14,385.88x = 255,971,555.34
  5. Step 5: Solve for x
    x = 255,971,555.34/14,385.88
  6. Step 6: Final answer
    x = 17,793.25

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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.