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Finding the Fourth Proportional to 14,409.72, 19,889.18 and 9,387.72

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Solution

The fourth proportional to 14,409.72, 19,889.18 and 9,387.72 is: 12,957.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,409.72 : 19,889.18 = 9,387.72 : x
  2. Step 2: Convert to fraction form
    14,409.72/19,889.18 = 9,387.72/x
  3. Step 3: Cross multiply
    14,409.72x = 19,889.18 × 9,387.72
  4. Step 4: Simplify right side
    14,409.72x = 186,714,052.87
  5. Step 5: Solve for x
    x = 186,714,052.87/14,409.72
  6. Step 6: Final answer
    x = 12,957.51

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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.