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Finding the Fourth Proportional to 14,007.88, 20,909.32 and 12,347.20

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Solution

The fourth proportional to 14,007.88, 20,909.32 and 12,347.20 is: 18,430.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,007.88 : 20,909.32 = 12,347.20 : x
  2. Step 2: Convert to fraction form
    14,007.88/20,909.32 = 12,347.20/x
  3. Step 3: Cross multiply
    14,007.88x = 20,909.32 × 12,347.20
  4. Step 4: Simplify right side
    14,007.88x = 258,171,555.90
  5. Step 5: Solve for x
    x = 258,171,555.90/14,007.88
  6. Step 6: Final answer
    x = 18,430.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.