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Finding the Fourth Proportional to 14,275.30, 19,699.92 and 7,987.68

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Solution

The fourth proportional to 14,275.30, 19,699.92 and 7,987.68 is: 11,022.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,275.30 : 19,699.92 = 7,987.68 : x
  2. Step 2: Convert to fraction form
    14,275.30/19,699.92 = 7,987.68/x
  3. Step 3: Cross multiply
    14,275.30x = 19,699.92 × 7,987.68
  4. Step 4: Simplify right side
    14,275.30x = 157,356,534.56
  5. Step 5: Solve for x
    x = 157,356,534.56/14,275.30
  6. Step 6: Final answer
    x = 11,022.99

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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.