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Finding the Fourth Proportional to 14,355.09, 19,809.77 and 7,981.74

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Solution

The fourth proportional to 14,355.09, 19,809.77 and 7,981.74 is: 11,014.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,355.09 : 19,809.77 = 7,981.74 : x
  2. Step 2: Convert to fraction form
    14,355.09/19,809.77 = 7,981.74/x
  3. Step 3: Cross multiply
    14,355.09x = 19,809.77 × 7,981.74
  4. Step 4: Simplify right side
    14,355.09x = 158,116,393.69
  5. Step 5: Solve for x
    x = 158,116,393.69/14,355.09
  6. Step 6: Final answer
    x = 11,014.66

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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.