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Finding the Fourth Proportional to 14,355.28, 19,809.25 and 7,981.98

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Solution

The fourth proportional to 14,355.28, 19,809.25 and 7,981.98 is: 11,014.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,355.28 : 19,809.25 = 7,981.98 : x
  2. Step 2: Convert to fraction form
    14,355.28/19,809.25 = 7,981.98/x
  3. Step 3: Cross multiply
    14,355.28x = 19,809.25 × 7,981.98
  4. Step 4: Simplify right side
    14,355.28x = 158,117,037.32
  5. Step 5: Solve for x
    x = 158,117,037.32/14,355.28
  6. Step 6: Final answer
    x = 11,014.56

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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.