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Finding the Fourth Proportional to 14,477.16, 19,978.74 and 8,190.84

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Solution

The fourth proportional to 14,477.16, 19,978.74 and 8,190.84 is: 11,303.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,477.16 : 19,978.74 = 8,190.84 : x
  2. Step 2: Convert to fraction form
    14,477.16/19,978.74 = 8,190.84/x
  3. Step 3: Cross multiply
    14,477.16x = 19,978.74 × 8,190.84
  4. Step 4: Simplify right side
    14,477.16x = 163,642,662.74
  5. Step 5: Solve for x
    x = 163,642,662.74/14,477.16
  6. Step 6: Final answer
    x = 11,303.51

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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.