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Finding the Fourth Proportional to 14,807.88, 20,439.54 and 14,315.40

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Solution

The fourth proportional to 14,807.88, 20,439.54 and 14,315.40 is: 19,759.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,807.88 : 20,439.54 = 14,315.40 : x
  2. Step 2: Convert to fraction form
    14,807.88/20,439.54 = 14,315.40/x
  3. Step 3: Cross multiply
    14,807.88x = 20,439.54 × 14,315.40
  4. Step 4: Simplify right side
    14,807.88x = 292,600,190.92
  5. Step 5: Solve for x
    x = 292,600,190.92/14,807.88
  6. Step 6: Final answer
    x = 19,759.76

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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.