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Finding the Fourth Proportional to 14,891.40, 20,899.80 and 14,891.40

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Solution

The fourth proportional to 14,891.40, 20,899.80 and 14,891.40 is: 20,899.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,891.40 : 20,899.80 = 14,891.40 : x
  2. Step 2: Convert to fraction form
    14,891.40/20,899.80 = 14,891.40/x
  3. Step 3: Cross multiply
    14,891.40x = 20,899.80 × 14,891.40
  4. Step 4: Simplify right side
    14,891.40x = 311,227,281.72
  5. Step 5: Solve for x
    x = 311,227,281.72/14,891.40
  6. Step 6: Final answer
    x = 20,899.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.